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This is Volume 1 of NASA's Apollo 11 Technical Crew Debriefing, dated July 31, 1969. The Mission Operations Branch of the Flight Crew Support Division at the Manned Spacecraft Center in Houston prepared it, and it was originally classified Confidential. In it Armstrong, Aldrin and Collins go phase by phase through suiting, launch, powered flight, Earth orbit and lunar surface activities. They comment on suit fit, vibration, checklists, lunar dust, footing and poor sleeping conditions in the lunar module. A section titled Visual Sightings appears in the table of contents.
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## CONFIDENTIAL ## ALDRIN 8. 2.23 DPS gimbal drive and throttle test Now, how about the gimbal trim. ## ARMSTRONG We did not drive the gimbal. Some question arose while we waited for confirmation from the ground, but they had proper gimbal positions, and we did not have to drive. ## ALDRIN ## 8.2.24 RCS pressurization and checkout I recall no problems there. The parker valves in the talkbacks gave us some rather funny responses. Gene's comments indicated that when you activate one of the quad pairs or main shutoff valve to a particular position, it didn't go to that new position until you released it. Through most of our training in the simulator, you'd move that valve as soon as you'd get it to the spring-loaded position of open and close, it would change, and it would stay changed when you would release it back to the center. If it didn't work that way, when you moved it, it didn't go to its new position until you released it. So we changed the simulator. We found something even further than that. The ascent feed 1's were open, and the 2's were closed. All of ## CONFIDENTIAL
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