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FOR SIMULATION USE ONLY – NOT A TRAINING AID
INSTRUMENTS
Instruments which are not part of an integrated system are covered in this
discussion. The instruments covered are the backup flight instrument and digital
clock.
BACKUP FLIGHT INSTRUMENT (BFI)
The backup flight instrument (BFI) is located in the upper right side of the
instrument panel in each cockpit and provides attitude, airspeed, vertical, and
velocity.
This instrument provides backup indications in the event of failure of the electronic
flight instrumentation system or the aircraft electrical system. The backup flight
instrument is normally powered by the battery bus. In the event of a battery bus
failure, the backup flight instrument is powered by the auxiliary battery, which is
activated with the AUX BAT switch on the engine/electrical switch panel in the front
cockpit.
Power for the backup flight instrument is provided through a circuit breaker,
placarded STBY INST, located on the STANDBY portion of the battery bus circuit
breaker panel in the front cockpit.
Power for the backup flight instrument in the rear cockpit is provided through a
circuit breaker, placarded AFT STBY, located on the STANDBY portion of the battery
bus circuit breaker panel in the front cockpit.
NOTE
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