Bleeds Off and Packs Off Takeoff Procedures

March, 25, 2021 by

A Bleeds Off Takeoff is when you takeoff while the engine bleeds off and use the APU bleed to pressurize the aircraft. This provides the aircraft with more power during takeoff by keeping more internal air pressure within the engines.

A Packs Off Takeoff is often an unpressurized takeoff that is used when the performance of a Bleeds Off Takeoff is needed by with an inoperative APU. In some cases, the APU can supply bleed air to the packs, consequently pressurizing the aircraft.

To replicate a Bleeds Off Takeoff within Infinite Flight, keep your APU on until climb, at which point you would shut it down as normal.

Luca Caviness is an editor for the IFATC Education Group and an IFATC Supervisor. He is also a real-world student pilot.