Piper ARCHER III Pilot Operating Handbook page 226

SECTION7
DESCRIPTION & OPERATION
Autopilot (Optional) (continued)
Autopilot Disengagement Methods:
The autopilot can be disengaged manually by the following "normal" methods
which are indicated by a yellow flashing AP annunciation:
• Pressing the A/P DISC I TRIM INTER switch on the control wheel
• Activation of either half or both halves of the manual electric pitch trim
switch on the control wheel
• Pressing the AP key on the MFD
• Pressing the TO/GA switch on the throttle (if optional Underspeed
Protection not installed)
The autopilot can be disengaged manually by the following "abnormal"
methods which are indicated by a red flashing AP annunciation:
• Pulling the AUTOPILOT or PITCH TR[M circuit breaker
• Activation of the stall warning system (if optional Underspeed
Protection not installed)
The autopilot can be momentarily disengaged by pressing and holding the CWS
switch on the control wheel.
The autopilot will disengage automatically under the following conditions
which are indicated by a red flashing AP annunciation:
• Internal autopilot system failure
• Total AHRS
• Total ADC failure
• Inability to compute default flight director modes
After any autopilot disengagement, the aural disconnect alert can be canceled
by pressing the A/P DISC switch or manual electric pitch trim switches
AUTOPILOT FEATURES
Overspeed Recovery Mode
Overspeed Recovery attempts to prevent the aircraft from exceeding the
maximum approved autopilot operating speed by providing a flight director
pitch up command whenever the airspeed trend vector exceeds 140 KIAS .
If flying manually, the pilot may follow the pitch up commands, or if
engaged, the autopilot will follow the command. The pitch up command
will not exceed that for level flight; to decelerate more rapidly the pilot
should reduce engine power. When Overspeed Recovery is active, an
amber MAXSPD is displayed above the airspeed tape. Overspeed Recovery
REPORT: VB-2749
7-40
failure
PA-28-181, ARCHER ill
ISSUED: December 22, 2017
REVISED: May 7, 2018
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