All the ATA L-10s are ex-somebody else. The RAF rumor concerns ATA's ex-RJ (Royal Jordanian) -500s. At least that makes them the same as the 9 the RAF already has. ATA used the -500s on Round the World cruises, so they must have been reasonably reliable. Also, the FAA took a very close look at them before they went to ATA. S/N 1217 needs closer scrutiny than the other 4 RJ -500s and could be a touch tail heavy.