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In both series, flight-deck air is taken from before the mix manifold, however series 4/8/900 flight-deck air may also contain trim air. DUCT OVERHEAT Cause: Duct temperature has exceeded 88C.
The simple in-flight fix is to reduce duct pressure by selecting CLB-2 and/or using engine and/or wing anti-ice. WING-BODY OVERHEAT indicates a leak in the corresponding bleed air duct. This is particularly serious if the leak is in the left hand side, as this includes the ducting to the APU.
A wing-body overheat condition is caused by a bleed air duct leak. It is sensed by the overheat sensors located as shown. Wing-Body Overheat Ducts and Lights [B737 - 600/700] LEFT LIGHT SENSORS LOCATED: BLEED DUCT FROM APU. LEFT-HAND AIR CONDITIONING BAY. LEFT ENGINE STRUT. KEEL BEAM. 1 2 3 4 5 RIGHT LIGHT RIGHT ENGINE STRUT. RIGHT INBOARD WING ...
5 de ago. de 2023 · Air Conditioning system. 737-400 Air Conditioning Schematic. The schematic below is shown here at a reduced resolution. A high resolution, fully updated schematic is available in the book.
11 de ago. de 2022 · Let's have a close look at the Air Conditioning System in the Boeing 737. If you like my videos please consider supporting my channel: ...more.
By examining the operation of each component in the air cycle process, a better understanding can be developed of how bleed air is conditioned for cabin use. Refer to Figure 2, which diagrams the air cycle air conditioning system of the Boeing 737.
Zone temperature is controlled by adding the proper amount of trim air to the air leaving the mix manifold through the zone supply ducts. ¡ The quantity of trim air is regulated by individual trim air modulating valves. ¡ If air in a zone supply duct overheats, the associated amber ZONE TEMP light illuminates, and the associated ...
