Piper Navajo PA-31 Service Manual page 116

PIPER NAVAJO SERVICE MANUAL
4-23. WING.
4-24. REMOVAL OF WING. (Refer to Figure 4-5.)
a. Close the fuel valve and drain the fuel from the wing to be removed. (Refer to Draining the Fuel
System, Section II.)
b. Remove the engine from the wing to be removed. (Refer to Removal of Engine, Section VIII.)
c. Remove the fairing and access panel from around the leading edge of the wing, located between
the fuselage and engine nacelle.
d. At the fillet fairing on top of the wing, between the fuselage and wing, remove the rivets that
attach the fairing to the wing.
e. Remove the access plates from the fairing located between the under side of the wing butt and
fuselage and the access plate to the spar splice located on the underside of the fuselage.
f. Within the fuselage, remove the fuel selector cover and spar cover.
g. Remove the fore and aft floor panels adjacent to the main spar and if removing the left wing,
remove the left forward floor panel between the fuselage side trim panel and control pedestal.
NOTE
To help facilitate reinstallation
of control cables and fuel or
hydraulic lines, before removing mark cable and line ends in some
identifying manner and attach a line where applicable to cables
before drawing them through the fuselage or wing.
CAUTION
To prevent damage or contamination of fuel, hydraulic and
miscellaneous lines, place a protective cover over the line fittings
and ends.
h. If the left wing is being removed, the following items pertain to the removal of the left wing
only:
1. Disconnect the primary control cables at the turnbuckles located at stations 100. and 110.,
between the left forward side trim panel and control pedestal. Draw the cables back through the spar.
Remove the elevator cable guard pin at station 122. to allow the cable ends to pass through.
2. Remove the left aileron cable guard pin at station 164.
3. The balance cable to the left wing may be disconnected at the aileron bellcrank, drawn
through the wing and taped out of the way at the side of the fuselage. The cable guard pin at the left wing
near the bellcrank and wing butt will have to be removed to allow the cable end to pass through.
i. If the right wing is being removed, the following items pertain to the removal of the right wing
only:
1. Disconnect the aileron control cable at the aileron bellcrank and draw it out through the
wing. The cable guard in the wing near the bellcrank and wing butt will have to be removed to allow the
cable end to pass through.
2. Disconnect the aileron balance cable at station 171. and draw the cable from the fuselage.
Remove the cable pulley to allow cable to be removed.
Reissued: 10/12/79
STRUCTURES
1E20