Rigging And Adjustment Of Elevator Trim Sender And Indicator; Rudder And Steering Pedal Assembly; Removal Of Pedal Assembly - Piper Navajo PA-31 Service Manual

PIPER NAVAJO SERVICE MANUAL
5-36. RIGGING AND ADJUSTMENT OF ELEVATOR TRIM SENDER AND INDICATOR. (Refer to
Figure 5-5.)
a.
Remove the access plate on the underside of the right horizontal stabilizer.
b.
Ascertain that the elevator trim is properly adjusted per Paragraphs 5-35 or 5-35a.
c.
With the arm (34) on the sender shaft free to rotate, set the elevator in neutral and the elevator
trim tab in the full nose down position.
d. Calibrate the trim indicator located in the control pedestal by first rotating the sender shaft (36),
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 needle on the pedestal gauge is in alignment with the full nose down bar. Tighten the arm on the
sender.
g.
Turn the trim control to both extremes and observe the trim reading. The indicator pointer
should travel to both extreme positions on the indicator dial.
h.
Should the indicator pointer not reach either extreme position on the dial, return the tab to the
full nose down position, loosen the sender in its bracket and slide it closer to the trim screw. Tighten the
sender and recheck extreme indications. If extreme indication is off scale, repeat steps f and g.
i.
Install the access plate.
5-37. RUDDER AND STEERING PEDAL ASSEMBLY.
5-38. REMOVAL OF PEDAL ASSEMBLY. (Refer to Figure 5-9.)
a. Remove the left pilot's seat and the floor panel to the left of the control pedestal.
b. Relieve tension from the rudder control cables by loosening one of the cable turnbuckles at
fuselage station 100.0
c. Disconnect the rudder control cables (25) from the pedal assembly.
d. Disconnect the brake master cylinder (26) from the pedal assembly.
e.
Disconnect the steering control rods (29) from the two inboard pedals (28 and 32).
f. Remove the rudder torque tube guards (35) if installed, by removing the machine screws, nuts,
and clamps (37) positioning the guards to the torque tube and remove the attaching hardware (36) securing
each guard to the brake line support channel (34).
g. Remove the small round access plate (23) located on the right side of the fuselage at station
87.25.
h. Remove the bolts that secure the retainer collars (5 and 18) and left pedals (28 and 33) on the
torque tube (6).
Reissued: 10/12/79
SURFACE CONTROLS
1J6