Installation Of Wing - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
m. Disconnect electrical wire connectors.
n.
Draw engine control cables back through the firewall, engine nacelle and wing.
o.
Arrange a suitable fuselage cradle and supports for both wings.
p.
Remove the brace assembly that the fuel selector attaches to and lay forward. Unbolt and remove
the angle support(s) that extend through the spar.
q.
To the side of the fuselage, at the top of the main spar, remove the fore and aft lower support
fittings. The upper fitting may remain in place.
r.
Also to the side of the fuselage, at the bottom of the main spar, remove the support bolt
assembly and spacer bushing.
s.
Unbolt and remove the vertical spar splice channels.
t.
Unbolt and remove the upper and lower horizontal spar cap splice plates.
u.
Remove the bolt assembly that attaches the front spar and fuselage fitting.
v.
Remove the bolt assembly that attaches the rear spar and fuselage fitting.
w. Pull the wing directly and slowly away from the fuselage, allowing lines, cables, etc., to follow.
4-25. INSTALLATION OF WING. (Refer to Figure 4-5.)
a.
Ascertain that the fuselage is positioned solidly on a support cradle.
b.
Place the wing in position for installation, with the spar end a few inches from the side of the
fuselage and set on trestles. Turn out the three adjusting screws that draw the bottom fairing against the
wing butt.
c.
Prepare the various lines, control cables, etc., for inserting into the wing or fuselage when the
wing is slid into place.
d.
Slide the wing into the fuselage (It may be necessary to insert a metal strip between the fillet
fairing and wing butt so as to funnel the wing between the upper and lower fairings) and butt the spar ends.
(Maximum distance of 1/32 of an inch is permissible between spar caps.)
e.
Install the bolt that attaches the rear spar and fuselage fittings.
f.
Install the bolt that attaches the front spar and fuselage fittings.
g.
Install and bolt the fore and aft vertical spar splice channels.
h.
Install and bolt the upper and lower horizontal spar cap splice plates.
i.
To the side of the fuselage, at the top of the main spar, bolt the fore and aft lower support fitting
to the upper support fitting and spar.
j.
At the lower side of the main spar install support bolt assembly and bushing.
k.
Install the angle support that extends through the fuselage and the brace assembly at the forward
side of the spar.
1.
Tighten bolts of all attachment fittings, plates, etc. Torque bolts securing horizontal spar cap
splice plates to 160 to 290 inch pounds or 13 to 24 foot pounds; all other bolts use standard torque values.
m.
Draw the engine control cables into place.
n.
At the wing leading edge and butt, connect the engine instruments, vacuum, fuel and hydraulic
lines. Secure the lines and cables in position with support blocks and clamps.
o.
Connect electrical wire connectors.
p.
Through the wing fairing access openings at the under side of the fuselage, connect the fuel and
hydraulic lines and fuel valves control cables.
q.
Draw flap control cable into position, ascertain rigging is set (Refer to Rigging and Adjustment of
Flap Controls, Section V) and secure cable.
r.
If the right wing is being installed, the following items pertain to the installation of the right wing
only.
1.
Route the heater air duct, heat control cable and antenna cables through the spar and
connect.
Reissued: 9/23/80
STRUCTURES
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