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 | 142
FOR SIMULATION USE ONLY – NOT A TRAINING AID
operational test of the AOA system can be performed using the AOA switch located
in the system test switch panel in the front cockpit.
Test low first, then high, and release. Holding the test switch to the LOW position:
Activates the AOA indexer amber donut on the forward and aft cockpit
indexers.
Deactivates the red chevron on the forward and aft cockpit indexers.
Sets the forward and aft cockpit PFD AOA indicators to the 10.5±0.4 unit
position.
Holding the test switch to the HIGH position:
Activates the green chevron on the forward and aft cockpit indexers.
Deactivates the amber donut on the forward and aft cockpit indexers.
Sets the forward and aft cockpit PFD AOA indicators to the 18.0±0.4 unit
position.
Activates the control stick shaker.
Releasing the test switch returns the system to the normal operating mode,
illuminating the red chevron, and deactivating the green chevron, AOA indicator, and
stick shaker.
STICK SHAKER
A stick shaker, which is activated by the angle of attack (AOA) system, provides
stall warning.
The stick shaker includes a small electric motor which drives an eccentric weight.
The stick shaker is mounted to the control stick interconnect tube near the aft
control stick.
The stick shaker is activated at approximately 5 to 10 knots above stall speed (15-16
units). When activated, the motor spins and the eccentric motion of the weight
shakes both forward and aft control sticks to warn of impending stall.
Function of the stick shaker may be checked with the AOA test switch on the test
panel in the forward cockpit left console panel. Setting the AOA test switch to the
HIGH position while the aircraft is on the ground (weight on wheels) activates the
stick shaker.
Power is provided through the AOA system circuit breaker, placarded AOA, located
on the battery bus circuit breaker panel in the forward cockpit.
Glideslope and Localizer Indicators
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