Some military aircraft may have crew divisions between the flight crew and the tactical crewmembers. Large passenger aircraft operators almost always differentiate between the flight crew and the flight attendants (cabin crew).
Aircrew members may include pilots, flight attendants, flight engineers, navigators, Taccos, signallers, observers, (air) gunners, weapons specialists, loadmasters and various electronics system operators depending on the age during which the aircraft operated and the type of operations.
Large passenger aircraft operators almost always differentiate between the flightcrew and the flight attendants (Cabin Crew).
For example manufacturer's representatives working on the flight deck to study the operation or behaviour of equipment are not members of the aircrew.
PSA Flight 182 was a Pacific Southwest Airlines commercial flight that flew on a Sacramento–Los Angeles–San Diego route.
Following a mid-air collision, the flight crashed into a San Diego neighborhood, killing all 135 on board, plus the two men on board a small aircraft and seven persons on the ground, on September 25, 1978.
One of the victims on board PSA Flight 182 was Alan Tetelman, president of Failure Analysis, en route to investigate a U.S. Navy plane crash.