Manual Electric Trim Test - Cessna 172R Operating Handbook

CESSNA
MODEL 172R
Upon applying power to the autopilot, the red P
warning on the face of the autopilot may illuminate
indicating that the pitch axis cannot be engaged.
This condition
approximately 30 seconds.
and normal operation will be available.
IF PITCH TRIM LIGHT STAYS ON, THEN THE
AUTOTRIM DID NOT PASS PREFLIGHT TEST.
THE AUTOPILOT CIRCUIT BREAKER MUST BE
PULLED. MANUAL ELECTRIC TRIM AND AUTO¬
PILOT ARE INOPERATIVE.
3. MANUAL ELECTRIC TRIM
a. LH SWITCH
OBSERVE NO MOVEMENT of Elevator Trim Wheel.
Release switch
If
movement
during
manual electric trim
flight may be continued if the AUTOPILOT Circuit
Breaker is pulled
until repairs can be made.
b. LH SWITCH
OBSERVE NO MOVEMENT of the Elevator Trim Wheel.
Release switch
c. RH SWITCH
hold for 5 seconds.
Elevator Trim Wheel. Verify red "P R" light above AP
button. Release switch
Revision 1
should
A
WARNING
-
PUSH FORWARD
Center OFF Position.
to
of the elevator trim wheel is observed
a check
of either LH or RH Switch, the
system
to the
PULL AFT
--
to center
-
PUSH FORWARD to DN position and
(Continued Next Page)
SECTION
SUPPLEMENT 15
NOTE
be
temporary,
The P will extinguish
as
TEST follows:
~
to
NOTE
has malfunctioned. The
OFF position and secured
to UP position and hold.
OFF position.
OBSERVE NO MOVEMENT of
OFF position.
to center
SUPPLEMENTS
9 -
-
FAA APPROVED
lasting
DN position and hold.
S15-20A