Elevator Trim Controls; Removal Of Elevator Trim Assembly - Piper Navajo PA-31 Service Manual

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ELEVATOR
STOP BT
1. ELEVATOR 1. STOP BOLT 4. RUDDER
2. RIGGING TOOL 2. STOP PLATE
5.
ELEVATOR
3. STABILIZER
3. TORQUE TUBE
Figure
5-6. Installation of Elevator Figure 5-7.
Elevator Travel Stops
Rigging Tool
f. With the elevator neutral, place a bubble protractor on the inboard section of the elevator and
establish neutral or zero on the protractor. Move the elevator up until the control arm contacts its stop.
(Refer to Figure 5-7.) Check the up travel as given in Table V-I. Adjust the stop screw in or out to obtain
proper adjustment. Move the elevator down and check the adjustment by the same method. Tighten ad-
justment screw locknuts and torque to 20-25 inch-pounds. The elevator control arm should contact its stops
before the control wheel contacts its stops.
g. Check control operation and direction of travel, bolts and turnbuckles for safety and installation
of cable guards.
h. Check the complete elevator control system (including Autopilot, if installed) to determine the
friction in the system. (Refer to Elevator Control System Friction Measurement, Section IV.)
i. Install access plates and panels, tail cone and seats.
5-28. ELEVATOR TRIM CONTROLS.
5-29. REMOVAL OF ELEVATOR TRIM ASSEMBLY. (Control Pedestal) (Refer to Figure 5-5.)
a. Remove the access plates attached to the sides of the control pedestal.
b. Remove the aileron trim control knob by removing the roll pin that secures the knob to the
screw assembly shaft and remove knob. Remove the covers from the face of the control pedestal.
c. Remove the right pilot's seat and the right row of passenger seats.
d. Remove the floor panel located aft of the control pedestal; the right panel forward of the main
spar; the right first and second panels aft of the main spar, and the panel lateral to the entrance door.
e. Remove the interior access panel to the aft section of the fuselage"
Revised: 5/3/84
SURFACE CONTROLS
PIPER NAVAJO SERVICE MANUAL
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