Cessna 172SPHUSR05 Pilot Operating Handbook page 405

C ESSNA
MOD E L 1 72S
EMERG E N CY P R OC E D U R ES
The four step procedure listed under paragraph A should be among
the basic airplane emergency procedures that are committed to
memory. It is important that the pilot be proficient in accomplishing
all four steps without reference to this manual.
1 . I n case of Autopilot, Autopilot Tri m , or Manual Electric Trim
malfunction (accomplish Items A and B simultaneously) :
A. Airplane Control Wheel -- G RASP FIRMLY and regain
aircraft control .
B . A/P DISC/TRIM
throughout recovery.
C. AIRCRAFT -
D . AUTO PILOT Circuit Breaker -- P ULL.
The AVIONICS MASTER Switch may be used as an
alternate means of removing all electric power from the
autopilot and electric trim systems.
steps 1 A through 1 C above, then turn the AVIONICS
MASTER Switch OFF before locating and pulling the AUTO
PI LOT Circuit Breaker.
Switch on as soon as possible to restore power to all other
avionics equipment.
compass, and altitude i nstruments wil l remain operational at
all times.
DO NOT
AUTOPILOT
AUTOTRIM,
MALFUNCTION U NTIL THE CAUSE FOR THE
MALFUNCTION HAS BEEN CORRECTED.
Maxim u m Altitude losses due to autopilot malfunction:
CON FIGU RATION
Cruise, Climb, Descent
Maneuvering
Approach
Origi nal Issue
S U P P L E M E NT 1 5 - FAA APPROVED
S E CTIO N 3
INT Switch
R E-TRIM Manually as Needed .
-
NOTE
Turn the AVIONICS MASTER
Primary attitude, airspeed, d i rectional
A
WARNING
ATTEMPT TO
FOLLOWING
OR MANUAL
S ECTION 9 - S U P PLEM E NTS
PRESS
--
If necessary perform
R E-ENGAG E
AN AUTOPILOT,
ELECTRIC TRIM
ALT. LOSS
350 ft.
1 00 ft.
90 ft.
HOLD
and
THE
S 1 5-1 5