Cessna 177 SERIES Service Manual

SECTION 9
STABILATOR
TRIM CONTROL
SYSTEM
Page
No.
TABLE OF CONTENTS Aerofiche/Manual
STABILATOR
TRIM CONTROL
Reassembly
. ...... . 1H1/9-5
SYSTEM ....
. ...... 1G21/9-1
Tab Free-Play Inspection . ... 1H1/9-5
Description ..............
1G21/9-1
Tab
Control Wheel .......
. 1H1/9-5
Trouble
Shooting . .
. . . . .
1G21/9-1
Removal
and Installation
. ..
1H1/9-5
Trim Tab
......
1.. . 1G22/9-2
Cables and
Pulleys .....
H1/9-5
Removal and
Installation
. .1G22/9-2
Removal and
Installation
. 1H1/9-5
Tab
Actuator.
....
......
G22/9-2
Forward Cable
.....
H/9-5
Removal and
Installation. . .
. 1G22/9-2
Aft Cable
. ..... . 1H3/9-7
Disassembly
....... . G22/9-2
Rigging
(Thru 17701530).
..... H3/9-7
Cleaning, Inspection
and
Rigging (Beginning
with 177015311 1H4/9-8
Repair
........
1G24/9-4
9-1. STABILATOR
TRIM CONTROL
SYSTEM.
screw jack actuator, to
a bellcrank and push-pull
tube
(Refer to figure
9-1.)
and
finally to the trim tab.
The trim tab also serves
as an anti-servo tab.
As the stabilator
moves
9-2. DESCRIPTION.
The stabilator
trim tab serves
through
its range of travel,
the tab automatically
a dual purpose.
As a conventional trim
tab, it is trims
opposite to afford a positive
"feel" to the con-
controlled by
the trim wheel.
Force to operate
the
trol wheel.
tab is transmitted
by cables and chains
through a
9-3. TROUBLE SHOOTING.
NOTE
Due to remedy procedures
in the following
trouble shooting
chart it may be necessary to re-rig system, refer to para-
graph 9-12.
TROUBLE
PROBABLE
CAUSE REMEDY
LOST MOTION BETWEEN
Cable tension too low.
Check and adjust tension.
CONTROL
WHEEL AND
TRIM TAB. Broken pulley. Check visually. Replace broken
pulley.
Cables not in place on
pulleys. Check visually.
Install cables
correctly
on pulleys.
Worn trim tab actuator.
Disconnect
actuator and turn
sprocket
by hand. Replace
actu-
ator if
internally
worn.
Actuator attachment loose. Check visually. Tighten actuator.
TRIM INDICATION IN- Indicator incorrectly engaged Check visually. Reset indicator.
CORRECT. on wheel track.
INCORRECT TRIM TAB Stop
blocks loose or in- Rig system
in accordance
TRAVEL.
correctly
adjusted. with paragraph
9-12.
Incorrect rigging. Rig system in accordance
with
paragraph
9-12.
Change
7
9-1

Cessna 177 SERIES Specifications

General

Manufacturer	Cessna
Engine Type	Piston
Wingspan	35 ft 6 in (10.82 m)
Seating Capacity	4
Number Built	4, 295
Engine	Lycoming O-360
Horsepower	180 hp
Maximum Takeoff Weight	2, 500 lb (1, 134 kg)