LOVELL AND HAISE'S NOTES DURING APOLLO 13.
Flown on Apollo 13, a sheet from the LM-7 Contingency Checklist, pp 28 and 29, 8 by 5½ inches, annotated in red, black and blue ink by James Lovell and Fred Haise.
A checklist sheet providing critical steps for rapid activation of the Lunar Module during emergency conditions on Apollo 13.
There are 19 annotations in red ink by James Lovell, associated with the Mid-Course Correction (MCC) burn that occurred at around 105 hours into the flight, after the Apollo 13 crew had come around the moon. Fred Haise modified Lovell's updates in black ink, and made his entries just before splashdown, when a final MCC burn was required before jettison of both the Service Module and Lunar Module.
Accompanied by a Typed Letter Signed by Haise, which reads in part: "Accompanying this letter is a sheet numbered 28 and 29 from the Apollo 13 LM-7 Contingency Checklist carried and used on the flight of Apollo 13 during April 11 to 17, 1970 ... This sheet is from the 30 minute activation section which was designed to rapidly power-up our Lunar Module 'Aquarius.' Commander Jim Lovell and I made extensive updates and modifications to steps on this sheet due to our emergency situation. Those steps included our Mid Course Correction (MCC) burn just after looping around the moon and another burn just before splashdown. These burns were critical to enable a safe return to earth.
The side numbered 28 has the last step of the Glycol Coolant Loop activation which was to open, then close those circuit breakers. Jim Lovell marked through two Reaction Control System (RCS) regulator warning lines with a red pen and added 'LGC' (LM Guidance Computer) and 'Caution Pre Amps.' That meant that we would get a warning light for the LGC and a pre-amp caution light. He then made a red slash line meaning to delete step 1 of the VHF/S-BD ACTIVATION AND CHECKOUT and changed part of step 2 to just 'Voice.' Jim then completely lined-out step 3. The two long red slashes on the lower half of this side told us that all those steps could be omitted for the MCC burn that occurred after looping around the moon at 105 hours and 18 minutes into the mission. We used the LM's large Descent Propulsion System engine for that burn which lasted about 15 seconds.
The side numbered 29 has the remaining steps of the DAP SET/GIMBAL DRIVE marked through with two red slashes. Jim then added 'Verify ASA cb 16 in for 10 Min' in red ink. That meant to verify that the Abort Sensor Assembly (ASA) circuit breaker was engaged for at least 10 minutes before we activated the Abort Guidance System (AGS), which performed the MCC burn at 105 hours and 18 minutes. We used this system because it required less power than the primary guidance equipment. The steps of the RCS PRESS section were all marked out with 5 red slashes. I added the comment of: 'See Note on Next Pg' during events described in the next paragraph.
As we approached the earth, Mission Control sent me instructions for the LM pre-entry procedures at about 128 hours into the flight. These updates were part of the complex steps to safely release 'Aquarius' from 'Odyssey' plus perform another MCC twenty-odd second burn using only the LM's attitude control thrusters. I crossed and marked out all of Jim's previous red ink writing with my black pen that was no longer valid or needed. Then at step 2 under the VHF/S-DB ACTIVATION AND CHECKOUT, I marked completely out the OFF/RESET part and added 'RANGING.' That set up a better method of communications. Under PGNS TURN - ON, I blacked out the Jim's red slash, underlined steps 1 and 2 to make it clear these were needed to be done, then added the entry of: 'V25 N07 E 1257E 252 E E (Activates All Vert. Jets).' These were computer command entries to activate all of our upward (vertical) attitude control jets. At the bottom of this side, I marked out another of Jim's red slashes and the N46 31021 value. That was changed to '32021.' The steps starting with N47 were not needed, so I marked all those out and just added the 'V24' command. No further updates for this procedure were required on either side.
After the flight I wrote on side 28 in blue ink with: 'Flight notes in red by Jim Lovell.' On both sides I wrote and signed: 'Flight notes in black by Fred Haise, Fred Haise, Apollo 13 LMP.' On the bottom edge of side 29 I wrote: 'Flight notes in red by Jim Lovell. Carried around the moon on Apollo 13.'"