Piper Navajo PA-31 Service Manual page 216

NOTES
1 AFTER STARTING WIRE THRU HEAD OF
SCREW, MAKE ONE COMPLETE WRAP
AROUND SHANK OF SCREW NEXT TO JAM
NUT FINISH WIRING THRU HOLES PRO-
VIDED IN FORGING. INSTALL SAFETY
WIRE THRU HEAD OF SCREW WITH WET
ZINC CHROMIC.
2. THE LOCK WIRE SHOULD ALWAYS BE
INSTALLED AND TWISTED SO THAT THE
LOOP AROUND THE HEAD STAYS DOWN
AND DOES NOT TEND TO COME UP OVER
THE BOLT HEAD AND LEAVE A SLACK
LOOP THE NUT MIGHT BE SAFETY WIRED
ALONG WITH THE SCREW.
I
PIPER NAVAJO SERVICE MANUAL
f.
Block the forward trim cables (6) at the trim screw assembly within the control pedestal and the
aft cables (13) at bulkhead 317.75, to prevent the cables from unwrapping from their drums, by one of the
methods shown in Figure 5-8. (If the aft screw assembly (19) is also to be removed, then remove the access
plate attached to the underside of the horizontal stabilizer and block the cables at the screw assembly
instead of in the fuselage.)
g.
Mark one set of cable ends to facilitate reinstallation and disconnect the cables at the turnbuckles
(12).
h.
Remove the cable guard pins at fuselage station 103.5, 125.0 and 243.5.
i.
Remove one screw from each set of rub blocks at stations 162.5, 174.0 and 215.0, and open
them far enough to allow the cable ends to pass through.
j.
Remove the screw that secures the elevator trim control wheel on the spline shaft and remove
wheel.
k.
Remove the screws that attach the screw assembly to the control pedestal. Draw the assembly
with cables from the front of the pedestal.
8904
AILERON BELLCRANK ASSY
SEE
C240
ELEVATOR HINGE ASSEMBLY
S/N 31-8152083 AND UP
RUDDER HINGE ASSY ELEY. HINGE ASSY
Figure 5-7a. Safety Wiring Control Surface Stops
Revised: 5/3/84
SURFACE CONTROLS
1124