For a military craft? Not at all, because they get infinite money thrown at depot maintenance, inspections, and so forth. There are B-52H bombers still being flown that rolled off the line (at Boeing, no less) in 1960. Russia is still flying Tu-95s from around the same period, if not a little older.
A civilian craft, though? Uhhh, what do you mean change the brake pads? We gotta think of next quarter’s profits! Just gas it up and fly already!
For a military craft? Not at all, because they get infinite money thrown at depot maintenance, inspections, and so forth. There are B-52H bombers still being flown that rolled off the line (at Boeing, no less) in 1960. Russia is still flying Tu-95s from around the same period, if not a little older.
A civilian craft, though? Uhhh, what do you mean change the brake pads? We gotta think of next quarter’s profits! Just gas it up and fly already!