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

NAVAJO CHIEFTAIN SERVICE MANUAL
e.
Relieve cable tension from the aileron cables by loosening one of the turnbuckles (17) in the
fuselage at station 76.00.
f.
Remove the aft access plate on the right fillet fairing located between the fuselage and wing.
Remove the aileron and aileron trim pulleys in the wing at station 29.00.
g.
Remove the outboard access plate located on the aft side of the wheel well. Remove one screw
from each set of rub blocks at wing station 54.00 and open the blocks enough to allow the cable ends to
pass through.
h.
Remove the access plate on the underside of the wing at the trailing edge at station 92.50.
i. Block the trim cables at the screw assembly within the control pedestal and within the wing at station
96.50 to prevent the cables from unwrapping from their drums by one of the methods shown in Figure 5-9. (If
the trim assembly within the wing is also to be removed, then remove the access plates at wing station 171.00
and block the cables at the trim screw assembly.)
j.
Mark one set of cable ends within the wing at station 90.00 to facilitate installation and
disconnect the cables at the turnbuckles (10).
k.
Remove the pulleys within the fuselage at station 102.00 and the cable guard pins at stations
99.00 and 163.00.
1.
Unbolt the screw assembly from its mounting bracket (12). Remove the screw assembly, drawing
the cables through the control pedestal from the wing and fuselage.
5-16. INSTALLATION OF AILERON TRIM ASSEMBLY (Control Pedestal). (Refer to Figure 5-3.)
a.
Ascertain that the cable is evenly wrapped on the trim drum (centered) and blocked to present
unwrapping. (Refer to Wrapping the Trim Drum. Paragraph 5-56.)
b.
Lubricate the screw assembly shaft bearing on the face of the control pedestal.
c.
Position the screw assembly in the pedestal on its mounting bracket and secure.
d.
Draw the cables from the pedestal through the fuselage and into the wing.
e.
Install the cable pulleys in the fuselage at station 102.00 and secure.
f.
Install the aileron and aileron trim pulleys in the wing at station 29.00.
g.
Set the aileron cable tension per Table V-II and check rigging and adjustment per paragraph 5-13.
h.
If the trim cables (9) from the screw assembly (4) within the wing are installed, connect the cable
ends at the turnbuckles (10) at wing station 90.00. (If the trim assembly within the wing is not installed.
pull the cables tight and block them, reaching through the access opening in the wing at station 92.50.)
i.
With the cables connected, install the cable guard pin in the fuselage at station 99.00 and 162.60.
j.
Close the rub blocks within the wing at station 54.00 and secure.
k.
Remove the cable blocks.
1.
Install the cover on the face of the control pedestal and the control knob on its shaft and secure
with roll pin.
m. Set cable tension with the turnbuckles (10) in the wing at station 90.00 per Table V-ll and check
rigging and adjustment per paragraphs 5-21 and 5-22.
n.
Install access plates and panels in the fuselage, on the underside of the wing and in the wheel
well. Install seats if required.
5-17. REMOVAL OF AILERON TRIM ASSEMBLY (Wing). (Refer to Figure 5-3.)
a.
Remove the access plates located under the wing along the trailing edge at wing stations 92.50,
117.50, 151.50 and 171.00
b.
Disconnect the trim control rod (5) located between the trim screw (44) and tab, at the screw.
c. Block the trim cables to prevent them from unwrapping from their drums at the screw assembly and
within the wing at station 87.50 by one of the methods shown in Figure 5-9. (If the trim assembly within the
fuselage is to be removed, block the cables at the screw assembly within the control pedestal.)
d.
Mark one set of cable ends at wing station 90.00 to facilitate installation and disconnect the
cables at the turnbuckles (10).
Reissued: 9/23/80
SURFACE CONTROLS
118