I A P 2 0 2 3 . 0 0 1 - A F M / I R I S T E X A N I I P A G E | 101
FOR SIMULATION USE ONLY – NOT A TRAINING AID
AURAL WARNING TONE GENERATOR
An electronic tone generator located in the audio management unit (AMU) provides
various distinguishable tones for pilot warnings. Tones generated by the AMU are
routed to the helmet audio connections, but tone audio volume is fixed and
independent of ICS volume.
Tones are activated using the same logic as the individual alert messages. Power
for the AMU is provided through a circuit breaker, placarded AUDIO, located on the
battery bus circuit breaker panel in the front cockpit and aft generator bus circuit
breaker panel.
The following table provides the tone descriptions and the purpose of each tone.
Purpose Tone Description
Landing Gear Position Warning 250 Hz tone, 5 times per second
Overspeed Warning
(VMO/MMO Exceeded)
1600 Hz tone, 5 times per second
Master Warn, Master Caution, Fire Decaying tone
Over G Warning Swept frequency tone
Altitude Warning Voice “Altitude, Altitude”
Bingo Fuel Voice “Bingo, Bingo”
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