wheel well fire A: Landing gear bay B: Avionics bay C: Cargo hold D: Rear fuselage

T or F 512 The pilot requests to go back to land due to a fire in the avionics bay. [音频]

Both sides of the 　switch should be placed in the OFF position before turning the MASTER switch ON or OFF, starting the engine, or applying an external power sources. A: AVIONICS B: master C: TEST

Due to frequent changes in, or varying combinations of, some types of equipment such as avionics and instrumentation, one or more separate documents for these products may be required. A: 由于某些类型的设备（如航空电子设备和仪表）的频繁变化或组合变化，可能需要一个或多个单独的文档。 B: 由于频繁变化或组合变化，某些类型的设备（如航空电子设备和仪表需要被放入一个或多个单独的文档。 C: 由于某些类型的设备（如航空电子设备和仪表）的个别变化或组合变化，可能需要一个或多个单独的文档。