Safety/Emergency Procedures
Instrument Flight
AOA INDICATOR FAILURE
The loss of the AOA indicator will mainly affect your approach scan: you will have to fly airspeed instead
of AOA. So you omit the AOA indicator and indexer from your scan, and focus on the Mach/airspeed
indicator instead.
Figure 45 shows one of the possible indications of a failed AOA indicator. Remember that the OFF flag
does not have to be present for the indicator to give false readings because the flag indicates only a lack
of electrical power.
30
20
O
F
0
F
10
Figure 45: FAILED AOA INDICATOR
The procedure for dealing with an AOA indicator failure is:
1.
Use the Mach/airspeed indicator.
2.
Fly calculated approach speeds, using the airspeed indicator.
(12-00) Original
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