Rigging And Adjustment Of Aileron Trim Sender And Indicator; Elevator Controls; Removal Of Elevator Control Cables - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
c.
With the trim screw (44) held from rotating, turn the trim drum (40) until .560 of an inch exists
between the forward screw stop and the drum housing (41), as measured along the screw. Do not measure
from sender mounting bracket. (Neutral position of the screw is at this measurement.)
d.
With the trim screw in neutral position, the trailing edges of the tab and aileron should align.
Should they not, remove the bolt (48) from the aft end of the trim control rod (5) and adjust the rod end
(47) until the trailing edges align. Reinstall bolt (48) and tighten it so that bushing will not rotate and
secure.
e.
Turn the trim in each direction to screw stops to check tab angle as given in Table V-ll and also
check the minimum number of cable wraps left on the drum. (Minimum allowable is one and one quarter
turns.)
f.
Check rigging and adjustment of trim sender and indicator per paragraph 5-22.
5-22. RIGGING AND ADJUSTMENT OF AILERON TRIM SENDER AND INDICATOR. (Refer to
Figure 5-3.)
a.
Remove the access plates on the underside of the right wing at station 171.00.
b.
Ascertain that the aileron trim is properly adjusted per paragraph 5-21.
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.
5-23. ELEVATOR CONTROLS.
5-24. 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 86.50, 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 86.50.
3.
Remove the cable guard pins at the forward pulley cluster at station 57.00.
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 86.50 to
the elevator bellcrank (14), the following procedure may be used:
1.
Remove the right and left pilot's seat and the right row of seats in the fuselage, if installed.
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.
Reissued: 9/23/80
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