How to start engines on the Boeing 737. The process of starting a jet engine is a little more involved than starting a car, and rather than the engine starter motor being powered electrically, the aircraft uses compressed air to spin the engine before fuel and ignition are added. The normal start process uses bleed air from the APU (Auxiliary Power Unit) situated in the tail of the aircraft, to spin the inner compressor, known as the N2 rotor. We ensure that the APU bleed valve is open and once

U.S. Air Force: Tactical Aircraft Maintenance

U.S. Air Force: Aircraft Maintenance

Aircraft maintenance is not like car maintenance, it's a continuous process of checks, tests and procedures, based on flight hours and cycles (take-offs and landings) A short haul airliner like the Airbus A320 or Boeing 737 has many cycles. These aircraft are using their undercarriage, brakes, tyres and other systems like thrust reversers, spoilers flaps/slats more often. Long haul aircraft like the Airbus A350 or Boeing 787 may only make 1 or 2 "cycles" in a 24 hour period, but spend many hours