Emergency Procedures - Cessna 172N 1979 Pilot Operating Handbook

4.13 Emergency Procedures

This information is supplemental to and does not supercede or amend
the information provided in the AFMS, POHS, SFM, for specific aircraft and
autopilot installation manuals.
NOTE:
If the aircraft does not have a copy of the required AFMS,
POHS, or SFMs' please contact customer service and
S-TEC will provide a copy at no cost. Have the aircraft
make, model, and type of autopilot when calling for this
supplement.
If the aircraft encounters any malfunctions with the A/P, follow the procedures
below:
In case of an autopilot malfunction, do not attempt to diagnose the
problem in flight.
1. Immediately regain manual control of the aircraft by overriding the servo(s)
and then disconnect the autopilot system.
NOTE:
The system includes a friction override clutch on each
servo. Overriding the Servo will not damage the system.
2. To disconnect the Autopilot, use one of the following means: Press and
release the remote AP Disconnect Switch on the Control Wheel (if installed).
Press and release the ON/OFF Switch on the Programmer/Computer.
Move the Autopilot Master Switch to "OFF". Pull the autopilot circuit breaker.
3. If improper operations occur during an instrument approach, disconnect
the system and fly a manual approach. If a failure occurs inside the
Final Approach Fix, it is advisable to conduct a Missed Approach, notify the
Air Traffic Control (ATC) of the problem and fly the approach manually
seeking ATC's assistance as necessary.
4. If a particular mode of operation, including ALT Hold, develops a fault peculiar
to that mode only, it is acceptable to operate the system in other modes as long
as a determination can be made as to their satisfactory function.
2nd Ed: October 25, 2002
WARNING
System 40/50 POH
4-13