What Specific Modifications Were Made To The Apollo 11 Spacecraft's Eagle Lunar Module's Descent Engine To Prevent The Computer-controlled Altitude And Velocity Data From Being Mismatched, Which Nearly Resulted In An Abort During The Mission's Lunar Landing Phase?

The Apollo 11 mission encountered a computer error (1202/1201) during descent, caused by an overloaded computer. To address the potential mismatch in altitude and velocity data, modifications focused on software rather than the engine itself. Updates included improving data handling algorithms and adding redundancies to prevent overloading. These changes ensured the computer could manage tasks without errors, allowing the engine to function correctly and enabling a successful landing.