See list belowDecember 4, 196868-PA-T-264APA/Chief, Apollo Data Priority CoordinationSome Mission D contingency plans
During a recent D mission rules review a couple of interesting things came up that I hadn't heard of before. You probably ought to know about:
a. The crew is considering making the docked DPS burn even if the PGNCS has failed. They would do this by turning off the gimbal trim motors – leaving the DPS in its pre-launch position, setting the AGS attitude control to pulse, and manually controlling attitude using the lateral translation RCS thrusters. They intend to check out this procedure in their crew trainer. And, this may be the only place it gets checked out before flight!
b. There was quite a discussion about what to do if they are unable to separate the LM and the S-IVB. The crew seems inclined to man the LM and power it up sufficiently to permit staging the DPS. That is, they would leave the DPS connected to the S-IVB and pull out only the Ascent stage. It is not clear that can be done with the LM in this configuration and so it is not clear what benefit is derived. Also it is not clear what risks are involved. Both of these are being evaluated in order to decide if this is worthwhile or not.