Piper ARCHER III Pilot Operating Handbook page 339

PA-28-181, ARCHER ill
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SECTION 7 - DESCRIPTION AND OPERATION OF THE AIRPLANE
The lights on the display shown in Figure 7-1 are a general representation
of angle of attack.
l. Stall is imminent or stall is occurring.
2. Approaching stall, such as stall warning.
3. Aircraft is operating at an angle of attack which provides adequate stall
margin.
4. Aircraft is operating at a relatively low angle of attack.
The reference marker is a white triangle along the right side of the display
which can be set by the pilot as a target angle of attack during specific phases of
flight. Experience with various flight conditions will allow the reference marker
to be set at the optimum locations.
The two buttons on the right side of the display peiform multiple functions.
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When the upper button is pressed quickly, it raises the reference marker towards
the high AoA side and when the lower button is pressed quickly, it lowers the
reference marker towards the low AoA side. Immediately after either button is
pressed, all lights on the display will momentarily illuminate giving the pilot
awareness of where the reference marker is being set. Holding the top button
for four seconds mutes or unmutes the audio. Holding the bottom bullon for two
seconds dims or brightens the display.
Circuit protection for the Safe Flight AoA system is provided by the AOA
INDICATOR circuit breaker located on the bottom right of the instrument panel,
Row 3, Col. 12.
SYSTEM USAGE
After turning on the AVION MASTER switch in the BEFORE TAXIING
checklist, the pilot should verify thar the AoA system self-test has successfully
completed.
approximately five seconds, followed by a set of lights that corresponds to the
current lift transducer vane position. An audio warning will also sound for the
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duration of the self-test. There is no specific lighting expectation during ground
operations, however, two red flashing lights at the top of the display or one green
light at the bottom of the display could indicate a jammed lift transducer vane. If
the red LED on the high side of the display is blinking slowly, the system must
not be used until a system calibration has been completed. Refer to Section 8 of
this supplement for further instructions.
ISSUED: December 22, 2017
REVISED: March 27, 2020
AND ITS SYSTEMS (continued)
During the self-test indicator lights will illuminate for
all
SECTION 9
SUPPLEMENT 9
REPORT: VB-2749
S of 8, 9-61