Aileron Trim Controls; Removal Of Aileron Trim Assembly (Control Pedestal) - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
3. Insert the tool between the bellcrank mounting brackets and over the end of the bolt from
which the nut was removed. (It may be necessary to loosen one of the primary control cables or the balance
cable.)
4. Position the tool so that it fits tight against the outboard side of the bellcrank stop block
(61).
5. Clamp the tool to the lower support bracket with a small "C" clamp. Place a small block of
wood or similar material between the clamp and lower bracket so as not to damage the bracket or bend the
turned edge that is around the bracket lighting hole.
b. Check or adjust the aileron for neutral position by the following procedure:
I. Place a modified straight edge. as shown in Figure 5-5 against the underside of the wing. next to
and outboard of the row of rivets at station 189.00 with the aft end of the tool even with the trailing edge of the
aileron. (This tool may be fabricated from dimensions given in Figure 5-31.) Do not place tool over rivets.
2. With the bellcrank in neutral and the forward edge of tool and spacer contacting the wing,
the trailing edge of the aileron should make contact with the aft end of the tool.
3. Should the three points not contact, loosen the jam nuts (52 and 58) of the control rod
ends (51 and 57) and rotate the rod (25) until the three contact points touch the skin surfaces. Tighten the
rod end locknuts.
c. With the bellcrank in neutral position, adjust cable tension as given in Table V-II to maintain neutral-
center alignment of control wheels. Remove the floor panel to the left of the control pedestal. Alternately
adjust the primary and balance cable turnbuckles (2) at the bellcranks with the turnbuckles (17) within the
fuselage at station 76.00. Cable tension should be taken at the non-ridged primary control cable and tension
corrected to ambient temperature per Table V-I. without autopilot bridlecables connected. Safety turnbuckles.
d. To adjust the interconnecting cables between the aileron and rudder cables, Tirst ascertain that
cable tension has been set for both the aileron and rudder cables. Ascertain that the aileron and rudder
controls, and surfaces are neutral, then remove the access panel to the aft interior section of the fuselage
and adjust the interconnecting cable turnbuckles (26) at station 285.00 so that the springs (28) will extend
.060 of an inch.
e. Place a bubble protractor on the inboard section of the aileron and establish neutral or zero on the
protractor. Remove the tools holding the aileron bellcranks in neutral, replace nuts and safety. Adjust the
bellcrank stop bolts (59) to the specific aileron travel from neutral as given in Table V-ll. Stops of both
bellcranks should contact their stop blocks at the same time and before the control wheel contacts its stop.
f.
Simulate flight load by dropping both aileron-trailing edges down to a maximum of 1/4" from
neutral. This adjustment is accomplished by adjusting the control rod connecting the bellcrank to the aileron.
NOTE
If provisions are provided for safety wiring the nut and screw on
the aileron bellcrank assembly, safety wire with MS33540 as
shown in Figure 5-8a.
g. Check control operation, bolts and turnbuckles for safety and installation of cable guard pins.
h. Install access plates and panels.
5-14. AILERON TRIM CONTROLS.
5-15. REMOVAL OF AILERON TRIM ASSEMBLY (Control Pedestal). (Refer to Figure 5-3.)
a.
Remove the right and left pilot's seat and the right row of seats within the cabin if installed.
b. Remove the access plate attached to the right side of the control pedestal.
c.
Remove the aileron trim control knob by removing the roll pin that secures the knob to screw
assembly shaft and remove knob. Remove the covers from the face of the control pedestal.
d. Remove the floor panel aft of the control pedestal, and the right panels fore and aft of the main
spar.
Revised: 3/5/84
INSURFACE CONTROLS
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