068:57:10 Discussion about DPS engine liner problem

[MadDogBV]

This was a topic actually discussed in the 13 Things That Saved Apollo 13 series. The decision to use the LM DPS engine to perform a PC+2 abort and fly around the Moon was considered one of the most vital choices ever made to save the lives of the crew, as it discarded the need to use an SPS engine that (at that time) was in unknown condition given its location in proximity to the explosion.

However, although DPS aborts had been practiced in sims, there was a concern regarding whether the engine liner could stand the treatment of a long burn of 800 ft/s or greater, particularly after having already used it for a midcourse to free return and with two more MCCs planned after the abort burn. During the Accident+1 Griffin shift, FIDO Dave Reed and CONTROL John Wegener discuss these potential problems, as it has a pretty major effect on their abort planning.

Link: https://apolloinrealtime.org/13/?t=068:57:00&ch=56

Note that due to the tape drift glitch, the GOSS-4 loop is used to capture CONTROL's portion of this conversation.

[kendradog]

To save future readers some googling, GOSS means "Ground Operational Support System", can't say I know what they do exactly.

What is the "liner" that the speakers are so concerned about?

By the way, SPAN is transcribed as SPAM in this clip.