Installation Of Flap Position Sender; Rigging And Adjustment Of Flap - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
5-67. INSTALLATION OF FLAP POSITION SENDER. (Refer to Figure 5-18.)
a.
Start the sender shaft (21) through its mounting bracket (24) hole and install the attachment
washer and nut over the shaft. Continue to slide the shaft through the hole and install the arm (22) on the
shaft. Secure the sender (23) in position. Allow the sender arm (22) to be free to rotate.
b. Connect the electrical leads.
c.
Check rigging and adjustment per paragraph 5-69.
5-68. RIGGING AND ADJUSTMENT OF FLAP. (Refer to Figure 5-18.)
a. Remove the access plate on the right wing false spar at wing station 92.50 and on the left false
spar at wing stations 92.50 and 101.00.
b.
The rigging and adjustment of the flap may be accomplished by the following procedure:
I.
Ascertain that the flexible actuator shaft (6) to the left transmission assembly (7) is connected
and safetied and that the right shaft (4) is disconnected from the right transmission (4). (Refer to Paragraph 5-
63.)
2.
Ascertain that the position sender arm (22) is free to rotate on the sender shaft (21) or the
linkage rod (15) is disconnected at the flap and taped back inside the wing.
3.
With the flap disconnected from the transmission tube (19), turn the actuator tube out 28
turns from its forward stop position, align the attachment hole in the tube with the holes in the flap horn
and temporarily install bolt (18).
4. Check alignment of the actuator and flap horn (17) by sighting along the actuator tube (19)
while the flap is in both the near extended and retracted positions. Do not run flap to its extreme position
(end of tracks).
5.
Should the tube (19) and horn (17) not align, disconnect the tube and loosen the bolts
securing the horn to the flap enough to allow the horn to be moved by tapping with a soft hammer.
Connect the tube to the horn, and tap the horn to achieve a satisfactory alignment. Lower the flap to the
near extended position, disconnect the tube from the horn and torque the horn attachment bolts.
6.
With the actuator tube (19) and flap horn (17) aligned, connect the tube to the horn with
bolt assembly (18). Tighten the castellated nut so as to allow .03 inches thrust play of the bolt and safety.
7. Connect the right flexible actuator shaft (4) to the right transmission assembly (3). (Refer to
Paragraph 5-63.)
8.
With the right flap disconnected from the transmission tube, turn the right tube out as far as
necessary to give the right flap the same angular setting as the left flap. (Rigging the right flap to the left
flap may require a smaller angular adjustment than can be accomplished by rotating the transmission
actuator
sleeve 180
°
on the screw. This can be done by disconnecting the flexible shaft from the
transmission and turning the transmission worm gear with a short slot head screwdriver.)
NOTE
When measuring flap deflection angles, lift the trailing edge of the
flap to eliminate play between rollers and track slots.
WARNING
Aircraft S Ns 31-5001 thru 31-7852171 refer to latest revision Piper
Ser ice Bulletin No. 739.
c.
The adjustment of the flap limit switches may be accomplished by the following procedure:
I.
Run the flaps to the 25 position and if not previously accomplished, install Kit 764 396 per
Piper S B 739.
2.
Laterally locate the arm on the sender shaft so the adjustment bolt (26) and flap actuator arm
on the arm (22) will contact the limit switch (20 and 25) plungers in the center of the bolt head and arm.
Revised: 10/5/83 SURFACE CONTROLS
Effectivite
DUKES
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