k. Remove the clamps necessary to release the electrical harness assembly. Disconnect the leads from the
terminal strip assembly by removing the cover, and appropriate nuts and washers.
l. With the appropriate trim panel removed, disconnect the hydraulic brake line at the fitting located within
the cockpit at the leading edge of the wing.
m. If the left wing is being removed, it will be necessary to disconnect the pitot and static tubes at the elbows
located within the cockpit at the wing butt line.
n. Arrange a suitable fuselage cradle and supports for both wings.
o. Remove the wing jacks.
p. Remove the front and rear spar nuts, washes and bolts.
q. Remove the eighteen main spar bolts.
r. Slowly remove the wing being certain that all electrical leads, cables and lines are disconnected.
4-15. INSTALLATION OF WING. (Refer to Figure 4-2.)
a. Ensure 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 supports.
c. Prepare the various lines,control cables, etc. for inserting into the wing or fuselage when the wing is slid
into place. Insure that the bushing is in place in the forward wing fitting.
d. Slide the wing into position of the fuselage.
e. Install the eighteen main spar bolts in accordance with the bolt legend in Figure 4-2.
—NOTE—
When replacing a wing assembly, ascertain that-the wing butt clearance is
maintained. (Refer to Sketch A of Figure 4-2.)
—WARNING—
The shim, part number 62121-00 must be installed under the washers on bolts
B1,B2,B3,B4 as per figure 4-2
Figure 4-2 for required hardware and torque value.
g. Install the bolt, washers, and nut that attaches the rear spar with the fuselage fitting. (Refer to Sketch B or
E of Figure 4-2 for required hardware and torque value.)
h. Insert the number of washers required between the forward face of the wing fitting and the aft face of the
i. Torque the eighteen main spar bolts to 360-390 inch-pounds. Ensure that the bolts, nuts, and washers are
installed in accordance with the bolt legend. The forward spar attachment bolt should be torqued to 50-60 inch-
pounds. Identify hardware, then torque the rear spar attachment bolt as shown in Sketch B or E of Figure 4-2.
j. Install the wing jacks and tail support to the tail skid with approximately 250 pounds of ballast on the base
of the tail support. Remove the fuselage cradle and wing supports.
PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
STRUCTURES
1E11
Issued: FEBRUARY. 28, 1989