Apollo 6
After the first stage was finished, the S-II second stage began to have its own problems. Engine number two (of five) had problems 225 seconds after liftoff. It got worse at 319 seconds, and then at 412 seconds the engine shut down. Two seconds later Engine Number Three shut down as well. The onboard computer was able to make changes and the other engines burned for 58 seconds longer than normal. The S-IVB third stage also had to burn for 29 seconds longer than usual. The S-IVB also did not work properly.