Rigging And Adjustment Of Aileron Trim Sender And Indicator; Elevator Controls; Removal Of Elevator Control Cables - Piper Navajo PA-31 Service Manual

PIPER NAVAJO SERVICE MANUAL
5-21. RIGGING
AND ADJUSTMENT OF AILERON TRIM SENDER AND INDICATOR. (Refer to
Figure 5-2.)
a. Remove the access plates on the underside of the right wing at station 171.0.
b.
Ascertain that the aileron trim is properly adjusted per Paragraph 5-20.
c. With the arm (36) on the sender shaft (33) free to rotate, set the aileron and aileron trim tab in
neutral position.
d. Calibrate the trim indicator located in the control pedestal by first rotating the sender shaft (33),
as viewed from the shaft end, in a clockwise direction to its stop position.
e.
Turn on the master switch. A minimum of 24-volts must be supplied to the electrical system
when making this adjustment.
f. Rotate the sender shaft slowly counterclockwise, when viewed from the shaft end, until the trim
indicator on the pedestal reads neutral. Tighten the arm (36) on the sender shaft.
g. Turn trim to both extremes and observe trim indicator reading. Indicator pointer should travel to
both extreme positions on the indicator dial.
h. Install the access plates.
5-22. ELEVATOR CONTROLS.
NOTE
Any time service is accomplished on the elevator control system, a
friction check must be made to insure that the friction is within
limits. Refer to Elevator Control System Friction Measurement,
Section IV.
5-23. REMOVAL OF ELEVATOR CONTROL CABLES. (Refer to FIgure 5-5.)
a.
To remove the control cables (1 and 2) that connect between the elevator control sector and the
aft control cables, beginning at fuselage station 110.5, the following procedure may be used:
1. Remove the left pilot's seat and the floor panel located on the left of the control pedestal.
2. Mark one set of cable ends to facilitate installation and disconnect the cables at the
turnbuckles (3) at station 110.5.
3. Remove the cable guard pins at the forward pulley cluster at station 82.5.
4.
The inboard (right) cable (1) may be removed by removing the three cable guard pins at the
control sector and pulley, disconnecting it from the lower end of the sector and drawing it aft, around the
pulleys.
5. The outboard (left) cable (2) may be removed by removing the cable guard pin at the
control sector (if not previously removed, when removing the inboard cable), disconnecting it from the
upper end of the sector and drawing it aft, around the pulley.
b. To remove the control cables (10 and 11) that route aft. beginning from fuselage station 110.5 to
the elevator bellcrank (14), the following procedure may be used:
I. Remove the right and left pilot's seat and the right row of seats in the fuselage.
2. Remove the floor panel to the left of the control pedestal, the left panels fore and aft of the
main spar, the center panel aft of the main spar and the floor panel laterally to the entrance door.
3. Remove the interior access panel to the aft section of the fuselage.
4.
Remove the left or right access plate located on the side of the fuselage.
5. Mark one set of cable ends to facilitate installation and disconnect the cables at the
turnbuckles (3) at station 110.5.
Revised: 3/2/84
SURFACE CONTROLS
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