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The first German jet engines built during the Second World War used a mechanical APU starting system designed by the German engineer Norbert Riedel.It consisted of a 10 horsepower (7.5 kW) two-stroke flat engine, which for the Junkers Jumo 004 design was hidden in the engine nose cone, essentially functioning as a pioneering example of an auxiliary power unit for starting a jet engine.
Honeywell auxiliary power units are a series of gas turbine auxiliary power units (APU) made by Honeywell Aerospace. Honeywell started manufacturing APUs in the early 1950s and since then they can be found on many aircraft. [1] Over the years Honeywell have produced more than 95,000 APUs and more than 36,000 are still in service. [2]
The fuel level indication system in the simplest form is a transparent window on the tank side and in its usual application a float-driven potentiometer installed in the tank. After the TWA Flight 800 disaster, a revision was made to aircraft fuel systems to address the potential explosion hazard of electrical components located in the fuel tank.
A report adopted November 21, 2014, by the National Transportation Safety Board determined that "the probable cause of this incident was an internal short circuit within a cell [cell 5 or cell 6] of the auxiliary power unit (APU) lithium-ion battery, which led to a thermal runaway that cascaded to adjacent cells, resulting in the release of ...
If the user has enabled it, the system will also write an entry to the system event log. The log entry contains information about the bug check (including the bug check code and its parameters) as well as a link that will report the bug and provide the user with prescriptive suggestions if the cause of the check is definitive and well-known.
A single point of failure (SPOF) is a part of a system that, if it fails, will stop the entire system from working. [1] SPOFs are undesirable in any system with a goal of high availability or reliability, be it a business practice, software application, or other industrial system. If there is a SPOF present in a system, it produces a potential ...
Automatic pressure altitude reporting system APC Auto pilot computer APIRS Attitude and positioning inertial reference system APOA Airport of arrival APOD Airport of departure APM Aircraft personality module APP Appendix APP Approach Control ATC APPL Application APPROX Approximately APS Auto pilot system APT Airport: APU Auxiliary power unit: APV
10.0–10.1: The system displays text on the screen, giving details about the error, and becomes unresponsive. 10.2: Rolls down a black transparent curtain then displays a message on a white background informing the user that they should restart the computer. The message is shown in English, French, German and Japanese.