There are lots of things to fail. On most military aircraft it is rare to fly with every tiny system running at 100%. Five or things can break during a flight without any real risk.
Not the engines, but something like a datalink antenna or camera system. If you include little things like tray-tables and seats getting stuck up/down, even the 747 probably has a failure rate measured in hours.
Not the engines, but something like a datalink antenna or camera system. If you include little things like tray-tables and seats getting stuck up/down, even the 747 probably has a failure rate measured in hours.