Piper ARCHER II Pilot Operating Handbook page 273

ESP requires:
e Pitch and Roll servos are installed and functioning
e Autopilot not engaged
e The GPS altitude above ground is more than 200 feet (for low airspeed made)
e Aircraft is within the autopilot engagement envelope (+/-50° in pitch and +/-75° in roll)
Protection for excessive Pitch, Roll, and Airspeed is provided when the limit thresholds are first exceeded, which
engages the appropriate servo in ESP mode at a nominal torque level to bring the airplane back within the normal
flight envelope. If the airplane deviates further from the normal flight envelope, the servo torque will increase
until the maximum torque level is reached in an atlempt to retum the airplane into the normal flight envelope.
Once the airplane retums to within the normal flight envelope, ESP will deactivate the autopilot servos.
AFMS — GFC 500 Autopilot in Piper PA-28 Series 190-02291-07 Rev. 5
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