> Additionally isn't there more analysis ? What are some scenarios ? I mean crashing after a failed launch attempt on the moon would perhaps be less disastrous than on earth, but can you realistically hope to survive a fall of several kilometers ?
I am not an expert, but I guess that the letter was mostly intened to cover cases where the https://en.wikipedia.org/wiki/Ascent_Propulsion_System failed to ignite at all, or perhaps sputtered early enough that the astronauts had a relatively soft landing after failing to make orbit.
Agree about the case when APS fails to operate. There were emergency procedures that involved disassembling some part of it and directly wiring a power connection to the oxidizer and propellant valves. See the end of https://www.hq.nasa.gov/alsj/LM11HandbookVol2.pdf
I think the latter scenario is virtually impossible: the ascent stage didn't have any landing gear and the engine wasn't throttlable, so even a relatively soft landing with fully operational APS would be impossible.
I am not an expert, but I guess that the letter was mostly intened to cover cases where the https://en.wikipedia.org/wiki/Ascent_Propulsion_System failed to ignite at all, or perhaps sputtered early enough that the astronauts had a relatively soft landing after failing to make orbit.