Abnormal Flight Director Mode Transitions; Autopilot Preflight Test Failure - Piper Archer III PA-28-181 Handbook

SECTION 3
EMERGENCY PROCEDURES
3.5e Avionics System Failures (continued)

Abnormal Flight Director Mode Transitions

Indication: Flashing lateral or vertical mode annunciations on PFD
Upon loss of a selected mode, the system will
revert to the default mode for the affected axis,
either ROL or PIT.
Loss of selected vertical mode
Autopilot Mode Controls ........ SELECT ANOTHER VERTICAL MODE
If on an instrument approach:
Autopilot ..................................................DISCONNECT (if coupled) and
Loss of selected lateral mode
Autopilot Mode Controls ..........SELECT ANOTHER LATERAL MODE
If on an instrument approach:
Autopilot ..................................................DISCONNECT (if coupled) and
Indication: Red Boxed PFT on PFD
AUTOPILOT Circuit Breaker (Row 3, Col. 2) .................................PULL
PITCH TRIM Circuit Breaker (Row 3, Col. 1) .................................PULL
AUTOPILOT and PITCH TRIM Circuit Breakers .........................RESET
When the AUTOPILOT circuit breaker is pulled,
the red PFT annunciation will be removed and
the autopilot will be unavailable. One attempt at
resetting the circuit breakers is allowed.
REPORT: VB-2749
3-36
NOTE

Autopilot Preflight Test Failure

NOTE
PA-28-181, ARCHER III
continue manually or execute
missed approach
continue manually or execute
missed approach
simultaneously
ISSUED: December 22, 2017