Originally Posted by Sliceback

It was an engineer who'd worked in the simulator trying to trigger every code/failure they could think of. They triggered 1201/1202 faults and were told to write down every fault code there was. They put a laminated chart of the fault codes under the glass at a console. Second link below has his first hand account of what occurred.

https://www.forbes.com/sites/lanceeliot/2019/07/16/apollo-11s-infamous-landing-error-code-1202-offers-earthly-lessons-for-self-driving-cars/?sh=6b07a2f034bc

http://www.collectspace.com/news/news-092016a-obituary-jack-garman-apollo11.html