There are many different APUs available for the 737. The Garrett GTCP (Gas Turbine Compressor [air] Power unit [electrics]) 85-129 was standard for the series 1/200 but when the -300 was introduced it was found that two to three times the energy was needed to start the larger CFM56 engines.

2021年4月20日 · A detailed description and history of the various APUs on all generations of the Boeing 737.Contents0:00 Intro2:47 Components5:16 Types of APU13:13 Captions2...

The Auxiliary Power Unit (APU) is an engine powered generator, either a gas turbine or a piston engine. APUs deliver enough power to start engines, power cabin lights, cockpit instruments and radios, and in some cases power hydraulics. Often the APU can only be run at lower altitudes where the air is thicker

2013年4月22日 · The document provides information about the auxiliary power unit (APU) on the Boeing 737 NG aircraft. It discusses the APU components, operation, controls, limitations and shutdown procedures. The APU supplies bleed air and electrical power when the main engines are not running.

2023年7月24日 · The Auxiliary Power Unit (APU) is a vital component of the Boeing 737 aircraft. It functions as an independent power source, supplying electrical power and pneumatic energy during various flight phases. The APU enhances the operational flexibility, reliability, and efficiency of the aircraft.

2024年12月16日 · The APU generator can power both AC transfer buses on the ground or in flight. Key principles of the 737 electrical system: AC power sources are not paralleled. Connecting a power source to a transfer bus automatically disconnects the existing source. The electrical power system is divided into three main categories: AC Power System; DC Power ...

6 天之前 · The APU is found on multiple types of aircraft, including commercial airliners, small private jets, and some military aircraft serving as an extra power source. The B-29, ...

2021年9月26日 · According to an FAA document from Nov 2020 on the 737-800 and 737-8 (aka Max) differences, which was "Approved by the Aircraft Evaluation Division", the removal of the APU EGT gauge does not impact the procedures or flight characteristics and is categorized as level-A ("Self-Instruction").

APU FAULT Light. Illuminated (amber) – A malfunction exists, causing the APU to initiate an automatic shutdown. If the light is illuminated when the APU switch is placed to OFF, the light extinguishes after 5 minutes. The light is disarmed when the APU switch is in the OFF position. APU LOW OIL PRESSURE Light. Illuminated (amber) –

2009年5月4日 · An “APU” (Auxiliary Power Unit) is a small turbine engine installed to provide supplementary power. Often found in the tails of larger jets and turboprops, APUs serve several useful purposes.