I thought by now pilots—especially professional pilots—would know not to troubleshoot equipment problems in the air. Especially significant equipment problems. Everyone should know by now that the best place to troubleshoot is on the ground and when significant failures occur, land the aircraft as soon as possible. Recent events suggest this is a lesson worth repeating.
Reading the preliminary accident report of the Lion Air crash on October 29, 2018, I was shocked that the pilots on the flight before the fatal flight lost significant instruments in flight and yet did not make the decision to land immediately. While the cockpit voice recorder of the fatal flight has been recovered, its contents have not been released. However, the air traffic control tapes are available both for the accident flight and the earlier flight in the same Boeing 737 Max. Investigators are questioning whether the problems experienced on the fatal flight were related to problems that occurred on earlier flights and whether the problems were properly addressed by maintenance when the aircraft was released for service on its fatal journey. For that reason, the preliminary report has more detailed information on earlier flights than one would typically find.