HP-41C (non graphing) was used on the space shuttle. I thought it was inline as a failsafe in case of the loss of one or part of the main computers but I can't

HP-41C (non graphing) was used on the space shuttle. I thought it was inline as a failsafe in case of the loss of one or part of the main computers but I can't find that from a quick search. here((1) is a quick article on the HP-41C used at NASA (1) https://www.hpmuseum.net/pdf/KeyNotes_1981_Jan_Vol5No1_17pages_OCR.pdf https://www.hpmuseum.net/pdf/KeyNotes_1981_Jan_Vol5No1_17pag...