NASA-UAP-D028, Apollo 17 Crew Medical Debriefing, 1972
Official released audio
NASA-UAP-D028 — Apollo 17 Crew Medical Debriefing, 1972
The Apollo 17 crew reported light flashes during their mission, attributed to cosmic rays affecting the retina, as discussed in their 1972 medical debriefing. This material highlights the biological impact of cosmic rays on astronauts, contributing to understanding space travel's effects on human physiology, particularly during the Apollo missions.
- File
- Audio · Release 04
- Date
- Dec 21, 1972
- Location
- Texas
- Agency
- NASA
Probed Assessment
The Apollo 17 crew reported light flashes during their mission, attributed to cosmic rays affecting the retina, as discussed in their 1972 medical debriefing.
Key takeaways
- Two Apollo 17 astronauts observed light flashes, a phenomenon noted during their post-mission medical debriefing.
- The light flashes are biologically linked to cosmic rays interacting with the astronauts' retinas.
- The debriefing provides direct astronaut testimony on the physiological effects of space travel.
Why it matters
This material highlights the biological impact of cosmic rays on astronauts, contributing to understanding space travel's effects on human physiology, particularly during the Apollo missions.
Corroboration
The claims are based on the Apollo 17 crew's medical debriefing, a primary source document, but lack additional independent corroboration from other missions or studies.
Open questions
- • How frequently did other Apollo missions report similar light flash phenomena?
- • What are the long-term effects of cosmic ray exposure on astronauts' vision?
- • Are there modern studies that replicate or expand upon these findings?
- • What measures, if any, have been implemented to mitigate this effect in current space missions?
- • Could this phenomenon affect future long-duration space travel, such as missions to Mars?
Probed separates this editorial assessment from the source claims below. It summarizes what the released artifact supports; it is not independent verification.
Official Description from War.gov
This file contains segment 1 of 2 of the Apollo 17 post-mission medical debriefing at the Manned Spacecraft Center (now Johnson Space Center), Houston, Texas. In the recording, crew members discuss the “light flash phenomena,” a then novel, now well-documented biological effect where high-energy cosmic rays pass through the eye and strike the retina, causing the perception of light streaks or flashes. Two of the three crew members reported observing these flashes at various points during the mission, including in lunar orbit and while on the lunar surface. The debriefing continues in the next file (NASA-UAP-D029).
Preserved verbatim as source metadata. This wording is separate from Probed’s file-specific description and assessment.
File Context
Related entities
Tracker findings
Apollo 17 crew reported no flashes during one blindfolded hour
The medical debriefing says all three crew members were blindfolded for an hour during the return trip and did not see a light flash in that interval.
Light flashes resumed after the no-flash interval
The same Apollo 17 debriefing records that the crew member saw the flashes again later that evening, bounding the earlier one-hour absence rather than treating it as permanent.
Release provenance
- Release
- Release 04
- Official ID
- release-04-file-039-nasa-uap-d028-apollo-17-crew-medical-debriefing-1972
- Cleared
- Jul 10, 2026
Related coverage
Sighting Context
Stored occurrence and enrichment data for this released artifact. Missing or regional data stays explicit rather than being inferred.
Shape not classified
No grounded form data
Observation profile
Recorded occurrence details
- Occurrence
- Texas · Dec 21, 1972
- Location
- Texas
- Classification
- Not classified
Environmental, lunar, orbital, satellite, airport, and nearby-infrastructure context loads when this section approaches the viewport.
Referenced Timeline
Apollo 17 Crew Medical Debriefing
The crew discussed the light flash phenomena during their post-mission medical debriefing.
Source Claims
Claims are attributed to the released source and remain distinct from Probed’s assessment and tracker findings.
Two of the three Apollo 17 crew members reported observing light flashes during the mission.
Two of the three crew members reported observing these flashes at various points during the mission, including in lunar orbit and while on the lunar surface.
The light flash phenomena is a biological effect caused by high-energy cosmic rays passing through the eye and striking the retina.
In the recording, crew members discuss the “light flash phenomena,” a then novel, now well-documented biological effect where high-energy cosmic rays pass through the eye and strike the retina, causing the perception of light streaks or flashes.
Source Material & Evidence
Transcript
We're picking up at 12-0 liftoff
rendezvous and dock . And again , we're
going to , where things went nominal ,
as per the checklist , uh , we're going
to , uh , Get the lunar surface
checklist here . Yes . OK , we're going
to say so . Let them power up . And
launch prep , uh , went well .
We , uh ,
Did not do the P22 .
Uh , And everything else just went as
advertised on a limb . She came up and
powered up , uh , beautifully .
Anything in there that's worth going .
OK , the , uh , liftoff was , uh , is ,
again , uh , went , Went to ,
Normal . We got all the , obviously all
our pyros , and , uh , we lost no
changeover Parker valves or anything .
Uh , the only thing that I would like
to mention , uh , let the LNP pick it
up here , is that , uh , very soon
after liftoff , uh , we had , uh ,
apparent loss of calm , a lot of noise
in the SPN . Uh , it turned out that we
were down lucky . Uh , but , uh ,
there was something , uh , wrong with
the uplink . So , uh , Uh , the
CDR watched the , uh , most of the
guidance and , uh , we call out in a
blind , uh , altitudes and goes and
what have you as we pitched over and ,
uh , pressed on up , but for about the
1st 2 or 3 minutes , I think the , uh ,
lunar module pilot had to concern
himself with trying to get combat .
Yeah , and again it was another
apparently I got her , or uh gallstone .
Dropped the uplink and then when they
were getting it back , I was switching
on these and for a while there it was
just completely out of phase . And , uh ,
But they were , apparently had a
continuous downwind . It was a very
inopportune time , I might say , to ,
because it happened just right after
ignition . I think that's something
though that the , uh , Encodes are
going to be able to clarify because we ,
we certainly can't give you the details .
It's just there was essentially no comm
on all the antennas . We , we got into
a , uh , they , they briefed us on a
trajectory . We , uh , we flew into a
trajectory that , uh , that appeared to
be nominal . The ag showed a slide out
of plane , I believe , and , uh , as a
result , our tweak at , uh , 9 ft per
second . It was -4 , -9 , and plus . We
burned out X , Z , Y in that order ,
and , uh , it looked like the eggs out
of plane , uh , indication was good .
About 7 ft per second , a little over 7
ft . Uh , and it looked like we might
have had a somewhat of a G sensitive ,
uh , drift in our , uh , NRY , uh ,
accelerometer and the pings , but , uh ,
the tweak , as it turned out , was an
excellent tweak . Uh , because our
rendezvous resulted in , uh , uh ,
In in just as nominal a rendezvous and
a nominal trajectory and profile as I
guess I've ever been involved with . Uh ,
The , uh , the drift in that
accelerometer did not bother us
anywhere else in the tracking or in the ,
uh , Uh , in a rendezvous at all .
Rendezvous , uh , navigation was , uh ,
followed a checklist . Uh ,
Uh , we got , uh , radar performed very
well . We had auto updates into the AGs .
Uh , the only thing I might mention
here is when it came to , uh , To
making a TPI burn ? We ,
uh , Uh , the residuals and the TPI
burn were greater than what I had
expected them , and we did not record
them because I wanted to get them , uh ,
I wanted to get them , uh , nulled out
just as soon as possible , but they
were , And I don't know the tents , but
they were -7 and x . Uh , and then they
were 4 and 4 , and I'm not sure whether
they were plus or minus in the Y and Z ,
but I , they were , they were , the
point I'm making is they were large ,
larger than I had expected . They were
-7 and a 4 point something and a 4 .
something . We , uh , reduced those to ,
uh , less than 2/10 of a foot per
second , and , uh , from there on
continued to plot right through the
midcourses , uh , right up the pike on
a nominal trajectory .
Uh Communications after that first ,
uh , lash up , you got any comment
about that ? Uh , the comment was good .
Uh , a couple of comments about the
eggs . After about 5 or 10 minutes , uh ,
or early in insertion , I always check
the , uh , accelerometers or the after
insertion . And they looked real good
except about 5 or 10 minutes later ,
and I can't remember exactly , I looked
and I had accumulated a 1 or 2 per foot ,
maybe 1.5 ft per second at X , so gene
went free and I , uh , did a gyrocal
and after that there was , uh , no
significant accumulation in the . And
that went very well . I did that
without talking to the ground , but I ,
I felt I had an understanding with him
that that was something that , uh , we
could do without . OK , the , uh , here ,
let me just also mention on the TPI
solutions , the ags had essentially a
within 2 or 3 ft per second a good TPI
solution after 6 marks . The insertion
solution . Was not very good .
It was off by , uh , a number of feet
per second and X . And even more and
see . so
This was your 1st 1 , 17 marks , and
this was your final . It didn't change
much at all , did it ? No . The pings
recycle and pings final were very close ,
within a couple feet per second . And X
right . Yeah . And a pings recycle , uh ,
had , I don't remember exactly the
cause for 15 marks . I think I , uh .
You had I had 1717 17 .
Uh , And there's more data in the data
card books about various egg at certain
times marks with the egg solutions .
OK , the midcourse solutions , uh ,
first mid course , uh , uh , agreed ,
effectively , uh , all systems except ,
uh , Uh , eggs out of plain was a
little bit high . And the decision was
made to burn the onboard pink solution
out of the lamb , which was -1.2 + 0.4
and + 0.3 . We continued to track .
Right up the pike , uh , mid course two
came up and , uh , we again compared
all the solutions , uh , the eggs out
of plane was , uh , still a little bit ,
uh , high and then , uh , actually the
opposite direction from the pings . Uh ,
we had a slight variation in the , uh ,
CSM solution in Z . I don't know why .
Uh , it came up with +5.4 ft per second
in Z , so we really didn't get a very
good correlation between the CSM and
the LEM on the , uh , second , Uh , mid
course , uh , but the pings was still
performing , the radar was still
performing , and , uh , based upon our ,
uh , trajectory plot and based upon ,
uh , our following the nominal , uh ,
inertial line of sight rates , we
decided to burn the , uh , Pings , on
boarding solution , uh , in the lab .
And it was -0.4 , 7 , and -1.6 ,
and from there on out , we just , uh ,
continued to follow the inertial line
of sight angles and , uh , uh , very
little tweaking , uh , In , uh ,
either in Y or Z and we just sort of
floated . Uh , right through the , uh ,
Breaking gates , uh , at 1 mile , I
think we put about , took about 6 or 7
ft per second off to hit 30 . We met
all the Gates , uh , Uh , as prescribed
and , uh , just , uh , came ,
Very moving very slowly into , uh ,
final station keeping , went into a ,
uh , A formation flight around the uh
CSM , uh , got a good inspection of the
spacecraft and the Symbay . The report
of which is in a transcript .
Everything looked good to us . Uh , we
eventually maneuvered , uh , the
command module maneuver to the docking
attitude . The 1 just took his position ,
his docking attitude , uh , did his
pitch and yaw maneuver , and , uh , or
gave the , uh , gave , uh , station
keeping control to the command module
to pitch and yaw maneuver and stood by
for . For docking . OK , uh , Commander
Marshal pilot proceeding along with the
docking . I think the , uh , one of the ,
More noticeable differences between ,
uh , this docking and the docking , uh ,
With the S4B is the fact that the SN
stage , uh , Dead bands a lot
more than the S4B did . Uh , S4B is
steady as a rock , but you could tell
the , uh , just watch the limb . Dead
band because it would change attitude
and then you'd try to follow it and
looking on the first attempt coming in
I must have had less than 0.1 of a foot
per second just barely closing on the
thing just taking it nice and easy ,
made contact and did not get
captured . OK , as soon as it didn't
get captured when it's obviously you're
closing too slow . I backed off , uh ,
oh , what , a couple of 3 ft , I guess ,
something like that , renewed the rates
and , uh , initiated the closing rate
and , uh , made , got captured . As
soon as we had to capture , both
vehicles went to CMC3 . And you look
around and , uh , uh , check the barber
poles and whatever and look back out ,
and here , uh , I had some rates in
the , uh , CSM and I'm sure now that
the , uh , the lam had rates also . You
must have had . Well , we , we did one
as soon as we , you went free . See ,
as soon as captured the lim went free .
Yeah . And then , uh , the , the CSM
trying to null the rates ended up
perturbating the limb and giving us
rates . Um-hum . So , uh , we finally
gave up on that , uh , Mode had the ,
uh , the lamb go to , uh , attitude .
And then once you go to the hole , then
the CSM can all the rates . And , uh ,
we've got it lined up . And , uh ,
attempted the hard docking , uh , no
problem . Probary tract , uh , came
back this time , uh , it didn't sound
like it was as much of a ripple fire .
It was more of a . And uh it was a
quicker . Docking . A heart , a quicker
heart doc than I was , uh , the
previous time . You got any more tape ?
OK , yeah . OK , I wanna say something
about visual sightings during a
rendezvous . Uh , I was able to from
the limb . I was able to see the
command module in , When it was
sunlit . At somewhere around 100 miles
and definitely defined that that was a
command module . Uh , I ,
after the command module went into the
darkness , I could not pick up his
tracking light . Until we were well
within about 40 miles , and I think
this transcript had got more an
accurate , uh , time , but could not
pick up the , Docking light , the
rendezvous light , uh , rather from the
command module two we were well within
40 miles and then just a very initially
very dim faint . Uh ,
Flash . I was able to verify on board
that the limb tracking light was
working and I finally figured out how
it was reflecting off the underside of
the EVA handrail on the left forward
side of the limb . So I could see the ,
Lam tracking light flashing
and also when there were , there were
some particles we took with us , uh ,
that stayed with the spacecraft and you
could see the sequential flash off of
those particles that was a result of
our , our tracking light .
OK , uh , this is the command module
pilot . I've already mentioned in
section 11.0 about the , uh ,
visibility of , uh , the lunar module
through the , uh , optics .
I got down here . Let's see . Anything
else to add about Photography and
television , and photography and the
limb , uh , we'll just have to wait and
footage . Uh , Fact is we put it on ,
see how it turned out . I took a lot of
uh , not only the ascent mag , but we
put it on the , uh , another mag . We
have part of the mag pill . So , and
that includes the Syey , uh , Right or
wrong , we did have a , uh , a Hasselbo
on board so we have a lot of hotbo
photography , the rendezvous and some
of the inner surface stuff in the
process of . OK . Post
docking , uh , like we're going to 13.0
lunar module jettison through TEI .
Post docking check and pressurization .
Well , first of all , I guess you said
you had every latch made this time ,
right ? Every latch worked done . All
wall docking latches worked , OK ? The ,
uh . So like , that sounds like it's
something to do with the mass of the
other vehicle involved here . The , uh ,
General comment I want to make about
the , the post oping operations is that
the , uh , Throughout the rendezvous ,
the , uh , The , uh , Both pilots in
the lim kept their helmets on for , uh ,
dust , keep the dust off primarily .
The commander took off his gloves ,
almost immediately after insertion and
flew the entire rendezvous that way .
You took yours off sometime later ,
didn't you ? I kept mine on , uh ,
After we've done a lot of transfer , I
can't remember because I kept your
gloves on too . You kept your gloves on .
Oh , I , oh , OK , after insertion I
did most of my , uh , pre-insertion
didn't want to take the time . I want
work with the gloves on because I
to get that initial ag solution and I
could , and I could get that . Fairly
rapidly with the gloves , and I didn't
take the gloves off until , uh , oh ,
maybe 10 or 15 minutes after insertion ,
but I kept the helmet on all the way
through most of the transfer just to
had the , uh , irritation , sinus
avoid breathing the dust because I've
irritation on the surface . And the
commander kept the helmet on , uh ,
throughout the rendezvous and , Uh ,
Docking , I took my gloves off after
insertion and left them off . Now ,
when we started , when we , we started
getting prepared , as soon as we were
hired dock , the commander . Took off
his helmet , And as I look back at that ,
because of the dust debris in the LMS
spacecraft . Uh , I'm sorry I did it .
Uh , I could have left the helmet on
and , uh , and I would have had a lot
less , uh , not troublesome , but it
was just , uh , eye and mouth type of
irritation . You knew you were in a
very heavily , uh , infiltrated
atmosphere on the limb . Uh , because
of the lunar dust , although it's , I
don't know how much lunar dust previous
flights had , but the , I think we
saved a great deal of grief by taping
up , by sweeping all the dust we could
find on the floor into the holes and
putting our tape covers over those
holes . I think that had to help a
lot of dust on the floor that , uh , we
great deal because there was an awful
didn't see . Uh ,
So I had the commander had his helmets
and gloves off off throughout the
entire , uh , transfer . Basically the
way we handled the transfer was the way
we had planned the , uh , I think the ,
uh , Le pilot did most of the
preparation of the gear in the uh . In
the , uh , limb and a , and a commander
stayed in a tunnel and , uh , Pass
things on and , uh , the , uh ,
inventory was going on on the command
module side and on the left side both .
We , uh , vacuumed each other's suits
the best we could and everything else
that got supposedly transferred
unbagged or uncovered . This is YMP and
in spite of the CMP's comments to the
contrary , I think we got things
remarkably clean , and it wasn't an
awful lot of dirt in it man like coming
back . Oh , that's , that's true . I ,
I didn't want to leave that impression .
OK , contrast , he may have thought it
was , but , but , uh , I was surprised
we were able to , uh , keep the . The
level of , uh , pardon the expression ,
contamination of the command module
down as well as that , that atmosphere
that the commander was referring to in
a limb after he took his helmet off , I
could go halfway through the tunnel and
stick my head up in the command module
and it was a totally refreshed ,
unpolluted atmosphere up there and it
never did get polluted . I think having
a vacuum cleaner running in the limb
had a lot to do with keeping the the
flow in the . And filling out the air .
Oh , did you ? Right . We never did
vacuum in the command module because
this wasn't necessary . It wasn't
necessary to vacuum in the command
module at all . And , uh , the suits
were noticeably cleaned by the vacuum
cleaner . Um-hum . You could tell you
although they were still , and every
were pulling stuff off of them ,
other subsequent time we handled them ,
we got our hands , but , uh , I think ,
uh , most of the tree dust was taken
care of . We , uh , uh , we effectively
stayed on a transfer list , uh , I say
effectively throughout that transfer ,
however , some things got transferred ,
uh , uh , out of order , uh , and got
temporarily stowed in the , uh ,
command module , but we effectively use
the , uh , transfer list as a , uh ,
not as a , a cookbook , Follow a recipe
type of thing , but as an inventory
list , and , uh , we inventoried it
several times from both ends and found
out that , uh , we were satisfied we
had everything transferred . And , uh ,
then press down with the lamp close out .
Lum close op went nominal . Uh , we got
back into the , uh , Into the limb or
into the command module and uh the
commander closed out the uh the the LMP
closed out the limb . Uh , and for
convenience , the commander , uh ,
effectively , uh , went back and closed
out the limb hatch , put in a command
module hatch , uh , because of the slow
tunnel vent , or the long duration of
tunnel vent , uh , the commander , uh ,
stayed in the tunnel , the LMP in the ,
his seat and the CMP in the left seat .
Uh , we suited up and got prepared for
our , uh , for our integrity check and
as soon as the , as soon as the lung
tunnel vent was complete and we were
satisfied with the integrity of the
hatch , we went into the , uh , uh , to
the , uh , suit integrity checks . Yeah ,
this is a CMP . Let me make another
comment on the tunnel vent time . I'll
bet it must take , uh , and , I'm not
sure if this is correct , but I bet at
least , uh , 3 or 4 times longer than
the simulator is for the tunnel vent ,
uh , move . And I think that's going to
be applicable to Skylab because of
their docking , uh , They're going to
have to vent before the end , doc .
Quite a , took quite a while . But
tunnel closeout was easy . We had no ,
uh , no , uh , rogue and no probe ,
which were stowed , uh , Uh , in the ,
uh , lamb for , uh , Lamjet .
Uh , going through the rest of these ,
uh , Mind triggers , uh , under lunar
myogiosis through TEI . We just
followed the checklist and it all
seemed to happen just as advertised .
Well , we got a little bit intrigued
with the , uh , The lun jettison , you
know , this time it was , it was great
and it just sailed out there nice and
pretty , and we got a lot of good
pictures of it , uh , where we should
have been maneuvering , and we ended up ,
uh , getting into P-41 after for the
set burn . Uh , a little bit of light .
But that's no problem either because we
just turn the residuals and people were
the one and and uh got a good supper .
I , I want to make a comment that I
think cleaning control , uh . In a
command module , uh . was excellent
considering all the dust and all the
dirt . Uh , that just seemed to adhere
to everything in the lamb . When we got
back in the command command module with
the exception of the suits . And with
the exception of the LNP and the CDR ,
Uh , Everything . Uh ,
was clean , uh , and that's for the
most part is because everything was
bagged before we brought it over ,
bagged and zipped , and we never did
open anything , uh , once we got it
zipped up , so the command module
stayed , and I think that Su fan filter
is probably going to be very , very
clean , stayed exceptionally clean
throughout the , uh , remainder of the
flight . Let me , uh , in the bagging ,
the decontamination bags I made a
special effort as for , uh . Request .
Pre-launched to uh pull those zippers
as tight as I could . And they should
be pretty tight so .
OK . Orbital
navigation , high gain one , why don't
you pick that up ? OK , I've already ,
uh , from except the TEI I have no , uh ,
no comments . I gain , that always
worked good . Omnis and S band were
good . Uh , photography , uh , When as
advertised , we have a lot of targets
of opportunity .
Uh , Syey operations , uh , have been
mentioned before . Let me just make one
gross comment about the way we handle
it as a three man crew at Syey
operations , which after . Did you get
that ? Did we ? Yeah . OK ,
it's covered . Uh it's covered . Oh ,
OK . I think I did say something , yeah
you did .
OK , the TEI updates . Normal .
Section of star checks were good for .
Got the commander's master alarm and
every one of them all through the
flight , which made me feel very good .
I made sure I got . I made , I made
Yeah , but you kept trying to get it .
sure I got it on those last few . I
wasn't going to change any mode of
operation .
I'll tell you that last one , Uh ,
where entry was the last one . I made
sure I got it on TEI . Just make you
guys feel at home . I figured you'd
think I didn't do it right if I didn't
get the master honor . The uh TEI at
halfG or whatever we were pulling there
uh was uh . Seemed like more than that .
Quite noticeable . Yeah , it sure did .
It seemed like it was really pushing
you back in the seat . Yeah . Ron and I
both , I think , started out holding
our heads up and eventually relaxing
back on the , on the couch . I guess we
must have had the spacecraft pretty
well stowed or tied down . Because ,
uh , as I briefed the CFP and LMP , and
as I recall , those kind of burns back
in Apollo 10 , lots of things start
moving through the spacecraft and find
their due , uh , on the , uh ,
On the after uh End of the spacecraft
because of the G load and much to my
surprise , uh , all we had was initial
thud as we moved away from the station
and we didn't have any gear coming from
anywhere flying through the spacecraft .
well . I , I got a , uh , caught a
So we must have cleaned it up pretty
white tagged wet wipe . A white tag
wet one . But other than , than maybe
one or two of those things , uh , and
looking back , uh , Uh , I would have
expected more gear to come . From
somewhere , but , uh , we prepared for
those burns pretty well . Well , that
reminds , brings up another point that
reminds me , though , is that there is
always water condensing on the ECU , uh ,
you know , the pipes and what have you
back in there when you get back to
clean the circuit return valve . And ,
uh , When we put our suits on for the
EVA the next day , your , your suits
were noticeably wet . Um-hum . And , uh ,
also when I pulled the PGA bag up , it
was damp down underneath the PGA bag .
So I think , uh , uh , as a nominal
procedure , we should have , uh ,
Either after the burn , probably before
the burn , make sure that we wiped out
the water in the LAB somehow to do that .
I wasn't really aware . Our suits were
damp when we put them out , but I was
I could not find any real water down in
not aware . I could look down there and
the , uh , Down there . Which is an ECS .
Yeah , an ECS , there's , there's
always water down there in ECS , and I
just assumed that's where all that came
all over . It , it's , it's , it's not
from , but , uh . It's funny , it was
a puddle of water . Like you say , it
was just damp . It was almost as if it
was condensing on all , all over the
was colder down in the LAB and water
city . It wasn't as if they were in a
puddle . Yeah . OK , I think that
covers , uh , right on through , uh ,
TEI . Let's see , uh , yeah , the one
thing I want to mention on TEI is that ,
uh , uh , again , the simulator is set
up such that , uh , in the rolled dead
band , it goes over to one side of the
rolled dead band and just kind of stays
there . And , uh , during the TEI burn ,
uh , it was bouncing back and forth
from one side of the , the dead band
turn over to the other side of the dead
band . And when it's bouncing back and
forth , the roll rate , Is up around ,
uh , Oh , Fortense , uh ,
4/10 of a degree per second , arching
back and forth across the road .
OK , 14.0 Trans-Eth Coast and the thing
that I just realized we've neglected to
say anywhere about systems , uh , I'd
like to mention chlorination at this
point in time . I think without fail ,
did you ever talk about it ? No , I I
think without fail , almost every
chlorination , Leaked .
Uh , sometimes larger quantities of
water , other times just small
quantities of water , and I'll tell you
where it leaks . Water or chlorine ?
Well , or both . It's a combination of
both . Chlorine and your chlorinating
and , uh , and buffer or water when you
withdrew the buffer sample . OK . But
where it leaked was , appeared to me to
leak within the ampule itself around
the bag because it was the chlorine ,
the cylindrical chlorine dispenser ,
That was continually Wet . It was not
the , uh , it was not where the , uh ,
dispenser fit into the , uh , needle or
where the , uh , uh , needle adapter
fit into the spacecraft . It was within
the barrel chlorine dispenser itself ,
and , uh , we continually ,
chlorination was , uh , was a , uh , a
case of , uh , Of always cleaning your
hands with chlorine because you always
had it available down there within that
dispenser and in some cases you had
larger quantities of water that had to
be wiped up with , uh , with a tissue .
That plagued us throughout the whole
mission . It turned out not to be a
serious problem because we learned how
to handle it , but , uh , that was one
system anomaly that never had really
been brought up . OK , look , let's see ,
uh , CMP , let me amplify that a little
bit .
In 2 cases . I'm
almost positive that when you , Put the
thing on in the bayonet fitting and
crank it on there . It did not puncture
the ampule itself . And the reason I
can , I believe that's correct is that ,
uh , When you start to , to crack the ,
uh , Outside of the . Cassette .
Down to to push the chlorine into the
into the water system , it was very
hard to turn . And if you , if you ,
Tried to force it , you could force it
on down there , and I'm sure that's a
good way to , to break , uh , an ampule
on the thing . And if you take it , uh ,
just , uh , in two cases , took the
bayonet fitting loose again and put it
back on there , and , and in both cases ,
Then you try to squeeze the uh chlorine
out of the ampula into the system and
it would turn easier but it's still
hard to to awfully hard to crank that
awful hard to crank that thing down .
But , uh , we did not , you know , we
got the chlorination done . We didn't
miss any injections of chlorine , and
we didn't miss , uh , We didn't miss
any of the , uh , buffer samples , uh ,
So I guess we got the job done . It was
just a little bit messy . And chlorine
was evident and because uh the CDR
eventually peeled all the outer skin
off his right hand and I'm convinced it
was due to the chlorine and had nothing
to do with the EVA . Boy , you lost a
little , a little flesh , a little skin
when you did . Yeah .
Transverse coast systems navigation ,
let's press on and see what we can say
about that . Don't have lunch today .
OK , uh , well , let me see how much
transverse coast we're gonna do . Let's
get , yeah , let's go through up to the
CSM EBA . OK , transverse coat , the
first thing I want to mention is
passive thermal control . Was Uh , at
what I would call unusual attitudes
because of the UVN IR requirements .
Now these unusual attitudes did two
things . They , uh , they put us , uh ,
they required us to remaneuver the
spacecraft several times and exit ,
enter and exit PTC several , several
times , which in itself was not a
problem . It was just , uh , additional ,
uh , coordination . Uh , coincidentally ,
most of these , uh , particular PTC
attitudes were within . 30 , certainly
45 degrees of gimbalak most of the time .
So we're looking at the red apple a
good portion of the trip home . Uh ,
but they also , uh , some of those
attitudes where you actually were not
in , were in attitudes and or PTC at
these relatively unusual positions . Uh ,
Change the , uh , The , the , uh ,
equilibrium heat load on a spacecraft .
You could see it in , uh , in RCS , uh ,
quad temperatures were all right , but
you could see it in helium package
temperatures , and most notably , you
could see it on the change in , uh ,
condensation from the tunnel hatch to
the , uh , forward hatch . The tunnel
hatch eventually for most of the way
home ended up to be very dry . Uh , and
the , uh , about the second day out on
the way home , the , uh , the , uh , or
the , uh , Main hatch Center
hatch . Uh , got .
Soaking wet to the point that , uh , I
even took a dry rag and wiped off some
of the uh latch components and some of
the , uh , gearbox components
externally , not that it did any good ,
but there was just that much water on
it . I , I think this is all due to the ,
uh , PTC attitudes required for the
Simba experiments on the way home .
Oh , it was colder in the spacecraft
too . Oh yes , it was colder in the
spacecraft . Not as cold as the
commander thought it was , but it was .
Cold enough to warm up on the
commander's orders .
And I just mentioned we warmed it up
with the ground suggestion of an extra
inverter and , uh , going to manual and
the pin . I think we discussed that
yesterday . We're on all your , uh ,
all your , uh , your ResMed changes ,
uh , your , uh , torquing , platform
torquing , all those , uh ,
Went very well , I thought . It went
great , uh , really well . The , uh ,
Uh , and , all the way back home , uh ,
it was just changing attitudes ,
changing attitudes , changing attitudes
with the exception of the EVA day ,
which , uh , we'll cover here . Shortly .
CSM EVA .
OK , on EVA prep . I think the only
anomaly we came across was the uh CMP's
uh . Well , let's see , you're on EBA
prep , but I really didn't have any .
We didn't know anything at that point .
On the , I was going to say on the
CMP's , uh , compare . But the
EVA prep went , uh , right down the
line . Essentially , it was all , uh ,
well laid out within the , uh ,
Experiments checklist and we checked
things off as we went and stayed pretty
much on the timeline . We started about
a half hour in and stayed a half hour
early . We , uh , we , we started out ,
we were a half hour early throughout
the whole thing and we lost , That half
hour and open the hatch just about it .
You turn the TV on exactly on time ,
and I can't remember a small little .
It was the carrier . Comp carrier
change . And we lost that half hour
during a comp carrier change on a tone .
Uh , Ron , I'd like to add that , uh ,
Uh , post EVA ,
That , uh , I think one thing that
helped us . Uh ,
Immensely on what ended up to be , I
think , a very fine , uh , Entry
storage was that we sort of , uh ,
backed off after the EVA and , uh , And ,
uh , Took a long , good long
list at the long range stowage , as
well as the post EVA stowage and really
effectively started housekeeping ,
cleaning up the cabin , and effectively
stowing some of the articles that were
not going to be used any further in the
mission for entry . At that time . At
that point in time , yes . So our entry
storage really started with the post
EVA time frame , period , and I think
that really helped us out in the long
run . OK , I think , uh , we should
mention how we got out of the suits and
I think to me that was a pretty
important , uh , way to get things done .
And ,
The only change . The only change to
the , to the , uh , Prep and or post
was the order in which we doffed and
donned suits because it was very
evident that there were certain
convenient ways because of the way the
student suits were stowed and uh the
way uh people fit into the , uh ,
checklist that we , uh , when we don
the suits , the commander . You got
down , you can't , you got in 1st . 1st ,
and I did and then run . Then the LNP
and the , and the CMP got down last ,
and it worked out very fine that way ,
plus the CMP had less work to do in his
suit , which also aided him in the long
run . When we doffed , I went first .
The LNP . Yeah , because I was stuffing
first , OK , then you and then the CDR
and then the CMP , and that wasn't
exactly what it was called for , but
the way it worked out the best . And we
that's the way it worked out . That's
stowed our suits in the L shaped bag
prior to . Putting the center ,
Couch back in , which was , uh ,
another good decision , I believe , uh ,
In helping us get the suit stove back
in that L shape bag .
Go ahead . OK , let's go on down to the
cabin deep breaths .
Uh , no problems . Normal , uh , deep
breaths . Hatch opening ? Uh ,
Even though the hatch was completely ,
uh , or the cabin was completely
depressed , I think we're reading zero
pressure on the thing , as soon as I
opened the hatch , There was enough
residual pressure or something inside
the spacecraft that it actually tended
to pull the the hatch out of my out of
my hand is bleeding into the cabin all
the time , so you never truly get zero .
That's right . You never truly get zero
on the thing , but the , the . Dump
valve was still open . And , uh , if I
had not been hanging on to the hatch ,
I would have blown it all the way over .
Well , Ron , to give you an idea on ,
that's , that's exact , that's not
had on the lunar surface . We
unexpected because it's exactly what we
completely , completely dump the lamp ,
and I'd still have to break that hatch
loose and hold it open about 6 or 8
inches until things just vented , and
then I could let go of the hatch and
open it all the way . If I didn't , it
would slam back closed . So we had an
inward . Oh , yeah . Different types of .
So it was basically the same thing .
You've got to open it up and really let
things get down to zero . OK , well ,
when I opened the hatch then , All of
the , uh , Excuse me . All
the little ice crystals and everything
started flowing out . Uh , a pen went
floating by . Something else went
floating by . I wasn't quite sure what
it was .
But , uh , there's all kinds of little
particles and pieces start , uh ,
coming out through the hatch . But I
sure didn't see , I looked specifically
for the scissors . I , I , uh , I
didn't see any scissors go out that
hatch . I hate to say it . None of them
went by my watch . I , I didn't none of
them went by me , Ron . I'd like to say
that they went out the , uh , the hatch ,
but I sure didn't see them go . Sure
you didn't say go by ? I didn't see , I
started to go by me and they put , put
caught the one thing that went ,
it in your pocket . You got to , OK ,
push straight . OK , the , uh ,
Once the , uh , all the particles and ,
and , uh , junk was out of the way ,
then you just push the hatch hatch open .
We had disconnected the , uh , uh ,
counterbalance , uh , uh , With the
beat to tool be there so that we locked
the hatch in the open position , so I
just shoved it open and it went beyond
the center position and locked in the
open position with no problem . Egress ,
uh , I had a tendency , I guess , uh ,
just like , uh , any other thing , it
seems like you want to float up , and I
had a tendency to float up against the ,
uh , MDC and had to consciously , Duck
and uh get as close my face as close as
I could to the bottom of the hat in
order to uh get past the uh . Get the
OPS past the MDC and get on out . TV
and deck insulation , uh , work fine .
I can hang on with the , uh , right
hand on the , uh , hatch , uh , the
great big , uh , D handle on the hatch .
And , uh , with the TV pole in my left
hand , and it worked out real fine to
just stick it in there and then line it
up with the mark and uh make sure it
was uh . Uh , locked in or clamped in .
And then , uh , climbed on up the pole
to , uh , turn the TV on or turn the ,
uh , dock on . And it was ,
you couldn't see the light . I couldn't
see the light on the thing , but you
could feel the camera running once you
turn it on . You could just touch it
vibrating a little bit .
and you could feel it , feel it
The , uh , lunar sound or cassette uh
retrieval , um . I think , uh , they
should be on the on board , uh , or on
the air-ground tapes . As I was
describing , uh , most everything that
was going on , there was no problem .
The pan camera cassettes were next . No
problem on the , uh , pan camera
cassettes and , and the pan camera ,
it's obviously a bigger mass , and it's ,
it's , uh , quite apparent when you try
to maneuver , move , move that big mass
around that it is heavier and it weighs
more than the , the other things . It's
easy to move , but it just takes a
little more effort to get it started
and you know that if you ever get it
to keep on going , you have to stop it .
started in one direction , it's going
So I just , uh , moved everything real
slow , tried to keep it under control .
Mapping camera cassette . Had the same ,
uh , problem I had in the , uh , In the
same by , uh , C 2 S2 , getting the ,
uh , The ,
uh , Thermal cover off . It's stuck
underneath the mapping camera laser
altimeter . Uh , door .
But , uh , there was no real problem ,
you know , I had the feet and the shoes
finally came off .
just give it a big jerk and then it
Symba inspection , uh , that's all
covered in the . On board the , I
mean the air to ground tapes . TV and
dock removal , uh , again , was real
simple . You just had to squeeze the ,
uh , the lever and TV came out and it
was easy to , uh , hang on with one
hand and maneuver the , uh ,
uh , TV around and , uh , point it
toward the , the moon because I didn't
have to worry about shining it into the
sun . When I tried to again hang on
with one hand and , and point the TV
around toward the Earth . It was the
earth was , well , maybe 10 or 15
degrees , probably 15 degrees from the
sun . And I tried to be a little more
accurate on the thing and when I did
that , then I lost , Kind of
effectively really lost control of the ,
Uh , my body position because I was
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