Cessna SkyHawk SP 172S NAV III 2005 Pilot Operating Handbook page 347

SECTION 9 - SUPPLEMENTS
SUPPLEMENT 3
CESSNA
MODEL 172S NAV III
EMERGENCY PROCEDURES
(Continued)
2. CHECK PITCH TRIM - An out of trim condition has existed
for approximately 20 seconds, take immediate corrective
action:
a. Airplane Control Wheel - GRASP FIRMLY and keep
airplane in control.
b. AlP DISCfTRIM INT Switch - PUSH and HOLD
throughout recovery.
c. AIRPLANE - RETRIM manually as needed.
d. AUTO PILOT Circuit Breaker - OPEN (PULL).
NOTE
Emergency Procedures for any malfunction are
essentially the same: immediately grasp the control
wheel and regain airplane control while pushing and
holding the AlP DISCfTRIM INT switch, then trim the
airplane as needed. After these steps have been
accomplished, secure the autopilot electric trim
system by pulling the AUTO PILOT circuit breaker.
As with any airplane emergency procedure, it is
important that the 4 steps of the Recovery Procedure
be committed to memory.
3. The AVIONICS BUS 2 switch may be used to remove all
electric power from the autopilot and electric trim systems
while the AUTO PI LOT circuit breaker is located and
opened. When the AVIONICS BUS 2 switch is OFF, the
autopilot and electric trim systems will not operate. After
opening the AUTO PILOT circuit breaker, set the AVIONICS
BUS 2 switch to the ON position to return power to the other
equipment on AVN BUS 2.
4. It is important that all portions of the autopilot and electric
trim system are tested prior to each flight in accordance with
the procedures published herein in order to assure their
integrity and continued safe operation during flight.
(Continued Next Page)
S3-18 U.S.
FAA APPROVED
172SPHAUS-S3-00