Inspection Of Wing Flap Transmission Actuator Cable (Dukes Only) - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
3-8. INSPECTION OF WING FLAP TRANSMISSION
(Dukes Installation S; N 31-5001 to 31-7852171).
(Refer to Figure 3-1.)
The flap transmissions are inspected at every 100 hour inspection cycle of the aircraft. This is accomplished
without removal of the transmissions. by the following procedures:
a.
Position the flaps in the extended position (Down).
b.
Remove the access covers on the lower wing surface to gain access to the flap transmissions.
c.
With the use of vise grip pliers and exerting light pressure, grasp the exposed portion of the screw
close to the transmission as shown. (Refer to Views A and B.)
d.
With the pliers secured to the screw. a light pressure will move the pliers and screw as free play in
the transmission gear set is taken up in either direction. Do not force the pliers.
e.
Place a six inch ruler along the skin surface as shown in View B. and measure the overall distance
the pliers move.
f.
Should this dimension exceed .32 (5. 16) of an inch. replace the transmission assembly or purchase
Gear Transmission Overhaul Kit 755 051. (Refer to Section V. Paragraphs 5-64 and 5-65 for transmission
removal and installation.)
NOTE
If replacement of transmission gears is required, perform trans-
mission run-in procedure as described in Appendix A. Piper S B
494B.
g.
Reinstall the access panels and make appropriate logbook entry.
h.
Continue inspection at 100 hour intervals.
3-8a. INSPECTION OF WING FLAP TRANSMISSION
(CALCO). (Refer to Figure 3-1.) The flap
transmissions are inspected at the first 500-hour inspection cycle of the aircraft and at each 100 hours
thereafter. This is accomplished without removal of the transmission. by the following procedures:
a.
Position the flaps in the extended position (Down).
b.
Remove the access covers on the lower wing surface to gain access to the flap transmissions.
c.
With the use of vise grip pliers and exerting light pressure. grasp the exposed portion of the screw
close to the transmission as shown. (Refer to Views A and B.)
d.
With the pliers secured to the screw. a light pressure will move the pliers and screw as free play in the
transmission gear set is taken up in either direction. Do not force the pliers.
e.
Place a six inch ruler along the skin surface as shown in View B. and measure the overall distance
the pliers move.
f.
Should the dimension exceed .300 of an inch. replace the transmission assembly.
g.
Reinstall the access panels and make appropriate logbook entry.
h.
Continue inspection at 100 hour intervals.
3-9. INSPECTION OF WING FLAP TRANSMISSION
ACTUATOR CABLE (Dukes System Only).
(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 of
bottoming against transmission.
Revised: 3/5/84
INSPECTION
1D17