lomapaseo:
Iran Air (sister ship of TWA800).
Obviously extremely rare and even more so today
It aint the years of service, its the flight cycles and the repair cycles.
TWA sold either 6 or 7 747s to the Shaw of Iran.
Once it was determined that airplane came down north of Madrid because lightning entered through fuel tank vent TWA installed a protecting device on the entire fleet. I don't recall the particulars now but the device was supposedly fast enough to prevent lightning from getting to the fuel vapors.