Piper Navajo PA-31 Service Manual page 84

PIPER NAVAJO SERVICE MANUAL
3-9. 100 HOUR INSPECTION
OF WING FLAP TRANSMISSION
ACTUATOR CABLE. (Dukes
System) (Refer to Figure 3-2.)
a. Remove access plate from underside of left and right wing trailing edge. to gain access to flap
transmissions.
b. Check the distance between the flexible shaft assembly nut and the transmission to determine if
shaft assembly is properly installed.
c. When properly installed. the nut on flexible shaft will bottom or be within 3 16 of an inch or
bottoming against transmission.
d. If inspection reveals that either of the shaft assemblies are not properly installed, it will be necessary
to correct as follows:
I Cut safety wire from nut and disconnect shaft assembly from transmission.
2. Align and insert tang on shaft assembly into slot in transmission. Tighten nut finger tight and
wrench not over 1 16 turn from fingertight. When installed by this methodthedimension
between the nut and
transmission will be noted in Step c. thus insuring that the end of shaft housing is firmly seated against
transmission. Safety nut with 040 wire.
e If flexible shaft assembly is disconnected from transmission or from flap motor. it will be necessary
to check the flexible shaft rigging as follows:
1.
As the last step after the flap system has been rigged and the flex shaft nut has been tigthened
and safetied. the flex shaft is to be disconnected at the flap motor. Examine the splined coupling for wear and
security. Inspect swedged end of inner cable for wear or looseness. Wear in excess of 005 inch deep on the
swedged terminal is cause for cable assembly replacement. If signs of wear are discovered (caused by the
washer). recenter the adapter plate over the motor drive spline. Remove motor, loosen the adapter plate
attachment nuts. recenter the plate over the spline and reattach and secure the plate (in some cases. it may be
necessary to rotate the plate 180 for better alignment). Also inspect swedged terminal for looseness.
2. Observe the clearance between the outer sheath and inner cable.
3.
Twist outer sheath in proper direction bringing clearance to 3 64 1 32 of an inch. It may be
necessary to loosen clamp on fuselage bulkhead in order to twist outer sheath.
4. Holding outer sheath in this position, insert spline into flap motor, tighten nut finger tight and
wrench not over 1 16 turn from finger tight. Safety nut with .040 brass wire.
5 Proceed with Steps I through 4 for other flex shaft if it has been disconnected.
6.
Tighten fuselage bulkhead clamp if loosened, reinstall access plates and make appropriate log-
book entry
32 MAX (DUKES)
30 MAX (CALCO)
VISE GRIP
PLIERS
-".
' .' SCREW
VIEW A VIEW B
Figure 3-1 Wing Flap Transmission Inspection
Revised: 11/15/82
INSPECTION
1D 12