|Quoting SEPilot (Reply 9):|
After the Aloha accident the FAA (and probably other regulatory agencies) paid a LOT more attention to older planes. Actually, it is cycles more than hours that determine an airliner's life, and if it is not airworthy for passenger service it is not airworthy, period
The major problem with ageing aircraft is that no one can predict ALL
of the problems that have yet to rear their heads. The older they get the obviously more extensive, expensive, and frequent the inspections and repairs will get.
I watched the DC9 and DC10 fleets encounter problems that many engineers at both the airline and the manufacturer did not anticipate. So new or newer replacements can be the a benefit.
I have a lot of trouble seeing the A320 as robust as the DC9, but time will tell.