Trim Tab Removal And Installation; Trim Tab Actuator Removal And Installation; Trim Tab Actuator Disassembly - Cessna 177 SERIES Service Manual

9-3. TROUBLE SHOOTING (Cont).
TROUBLE PROBABLE CAUSE REMEDY
TRIM CONTROL WHEEL
Cable tension too high. Check and adjust tension.
MOVES WITH EXCESSIVE
-RESISTANCE. Pulleys binding or rubbing. Check visually. Repair or
replace pulleys as necessary.
Cables not in place on pulleys. Check visually. Install cables
correctly on pulleys.
Trim tab hinge binding.
Disconnect trim tab push-pull
tube and check for binding.
Lubricate or replace hinge as
necessary.
Defective trim tab actuator. Disconnect actuator and turn
sprocket by hand.
Replace
actuator if defective.
Rusty chain. Check visually. Replace rusty
chain.
Damaged sprocket.
Check visually. Replace damaged
sprocket.
Bent sprocket shaft. Check visually. Replace bent shaft.
Actuator pivot binding. Disconnect bellcrank at lower end
of actuator and check actuator for
binding. Replace defective parts.
Bellcrank binding. Disconnect actuator and push-pull
tube from bellcrank and check
bellcrank for binding. Replace
defective parts.
9-4. TRIM TAB. (Refer to figure 9-1.) b. Remove safety wire and relieve cable tension
at turnbuckles (10).
9-5. REMOVAL AND INSTALLATION.
a. Remove push-pull tube attach point cover and (CAUTION
disconnect push-pull tube (21) at tab.
Position a support stand under tailskid
NOTE
assembly to prevent tailcone from drop-
ping while working inside.
If trim system is not moved and actuator
screw is not turned, re-rigging of system c.
Remove screws securing actuator bracket (20)
should not be necessary after reinstalla-
to support bracket.
tion of tab.
d.
Remove chain guard (18) and disengage chain
(6) from actuator sprocket (2).
b. Remove hinge pins from hinges and carefully e. Disconnect actuator (21) from bellcrank (23) and
remove tab.
remove actuator from aircraft.
c. Reverse preceding steps for reinstallation.
Rig f. Reverse the preceding steps for reinstallation.
system if necessary in accordance with paragraph Rig system in accordance with paragraph 9-12,
9-12.
safety turnbuckles and reinstall all items removed
for access. For lubrication requirements refer to
9-6. TRIM TAB ACTUATOR. Section 2.
9-7. REMOVAL AND INSTALLATION. (Refer to 9-7A. DISASSEMBLY. (Refer to figure 9-3.)
figure 9-1. )
a. Remove actuator in accordance with paragraph
a.
Remove rear baggage compartment wall and 9-7.
tailcone access plates.
9-2 Change 3