Cessna 150M - Elevator Control System

TABLE OF CONTENTS
ELEVA
TOR CONTROL SYSTEM
Description
Trouble Shooting . . . . .
Elevators ....... .
Removal and Installation
• Repair ....... .
Bellcranks . . . . . . . .
SECTION 8
E LEVA
TOR CONTROL SYSTEM
Page
8-1
8-1
8-1
8-2
8-2
8-2
8-2
Forward ....... .
Removal and Installation
Rear ......... .
Removal and Installation
Cables and Pulleys . . . .
Removal and Installation
Rigging ........ .
8-2
8-2
8-2
8-2
8-2
8-2
8-6 •
8-1. ELEVATOR CONTROL SYSTEM.
8-2. DESCRIPTION. The elevators are operated
by power transmitted from the control wheels through
a series of cables, bellcranks and a push-pull tube.
The rear bellcrank serves as an interconnect between
the elevators and a bearing point for the travel stop
bolts. An elevator trim tab is installed on the right
elevator and is described in Section 9.
8-3. 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 8-14.
TROUBLE PROBABLE CAUSE REMEDY
NO RESPONSE TO CONTROL
Forward or aft end of push-pull
Attach push-pull tube correctly.
WHEEL FORE-AND-AFT tube disconnected.
MOVEMENT.
Cables disconnected.
Attach cables and rig system in
accordance with paragraph 8-14.
BINDING OR JUMPY MOTION
Defective forward or rear
Replace bellcrank.
FELT IN MOVEMENT OF ELE- bellcrank pivot bearing.
VATOR SYSTEM.
Cables slack.
Adjust to tension specified in
figure 8-1.
Cables not riding correctly on
Route cables correctly over
pulleys.
pulleys.
Nylon grommet on instrument
Replace grommet.
panel binding.
Defective control "y" pivot
Replace bearing.
bearing.
Defective elevator hinges
Replace defective hinges.
or lubrication needed.
Lubricate per Section 2.
Clevis bolts too tight.
Readjust to eliminate
bolt binding.
Lubrication needed.
Lubricate piano hinges.
Defective pulleys or cable
Replace defective parts and
guards.
install guards properly.
Change 3 8-1