Shoulder Harness Inertia Reel Adjustment; Control Surface Balancing - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
4-90. SHOULDER HARNESS INERTIA REEL ADJUSTMENT.
a. Allow the harness to wind up on the reel as much as possible.
b. On the end of the reel, pry off the plastic cap over the spring, making sure the spring does not come out
of the plastic cap, and set cap aside.
c. Unwind the harness completely, then measure and mark the harness 24 inches from the reel center.
d. Wind the harness onto the reel until the 24 inch mark is reached, then hold reel and place cap with
spring over the reel shaft end.
e. Aligning slot in shaft with spring tang, wind spring 6 turns ± 1/2 turn and snap the plastic cover into
holes in reel end shaft.
f. Release harness and allowing it to wind up, extend the harness a few times to check reel for smooth
operation.
g. With reel fully wound, hold with inertia mechanism end up and pry off plastic cap over mechanism
and set reel aside.
h. Install nut in plastic cap so that stud in cap is flush with nut surface, then reposition cap over reel end
and orientate properly, snap in place. Extend harness a few times to make sure action is correct.
4-91. CONTROL SURFACE BALANCING. The movable control surfaces have been statically balanced at
the time of installation at the factory and normally need not be rebalanced unless the surfaces have been
repainted, repaired or replaced. Each control surface must be complete including paint, tab where required,
balance weights, static wicks, etc. Tabs must be held in neutral position with a small piece of tape. Tab
actuating rods must be in place and connected to the tab. The forward end of the actuating rods must be
disconnected from the attachment points. Disconnected actuating rods (forward ends) must be positioned
to correspond to the neutral tab position.
Revised: 3/11/81
STRUCTURES
1G10