Piper Navajo PA-31 Service Manual page 239

PIPER NAVAJO SERVICE MANUAL
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 position
actuator arm) on the sender arm (22) will contact the limit switch (20 and 25) plungers in the center of the bolt
head and arm.
3. Tighten the arm clamping screw (30) in such a way that moving the arm (22) will rotate the
sender shaft (21), but the arm will slip on the shaft if the shaft is securely held.
4. Connect the linkage rod (15) to the tab on the flap using the rod attachment bushing (16) and
screw with nylon insert. The rod should extend through the bushing (16) and screw with nylon insert. The rod
should extend through the bushing .12 of an inch.
5. Adjust the flaps to an extended setting as given in Table V-I by bending the position actuator
arm to actuate the down limit switch (20). Tighten the jam nut.
6. Run the flap up to a near retracted position. Make a full extension run to insure that the
momentum of the flap going down and tightening ofthejam nut has not moved the flap setting from the setting
tolerance.
CAUTION
Flaps must stop prior to making contact with the flap travel stops
installed per Kit 764 396.
7. Adjustment of the up limit switch (25) is accomplished in the same manner except that the flaps
should be stopped in the retracted position just as the flap rollers approach the end of track slots. (Approxi-
mately .062 of an inch on the closet roller both flaps.) Ascertain a .06 clearance between sender arm rod linkage
attachment and spar
d.
Check adjustment of the flap position indicator.
e. Refer to Section III. for information on reduction of friction or for wing flap motor no load RPM
check if operational problems exist in the flap system.
f.
Flexible shaft assemblies disconnected from transmissions or from flap motor necessitates a check
of the clearance between the inner cable and outer cable sheath with the transmission end of the cable
connected per Paragraph 5-61.
g.
Check that all necessary bolts are safetied, clamps secured and access plates installed.
NOTE
After rigging of flaps gap "A" shall not exceed .73 inches. (Refer to
Figure 5-17 )
Revised: 10/12/83 SURFACE CONTROLS
Effectivity
DUKES
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