Piper Navajo PA-31 Service Manual page 127

PIPER NAVAJO SERVICE MANUAL
g.
With the correct shim determined (only one shim plate is allowed and can not exceed .091
thickness), loosen the forward spar attaching bolts and remove the rear mounting bolts. Slide the shim
between the spar and rear bulkhead and reinsert bolts.
h. Tighten all mounting bolts.
i. If the right stabilizer was removed, enter through the top access hole and route the trim tab
control cables forward and install cable pulleys.
j. Connect the trim sender wires.
k.
Connect the trim cable ends and set cable tension. (Refer to Section V.)
1. Install the elevator(s) in accordance with Paragraph 4-29.
m.
Check elevator trim and elevator operation. (Refer to Section V for the rigging and adjustment of
elevator and elevator trim controls.)
n. Install all access plates and panels.
4-36. RUDDER.
4-37. REMOVAL OF RUDDER. (Refer to Figure 4-6.)
a. Relieve cable tension from the control system by removing the floor panel to the left of the
control pedestal and loosen one of the rudder cable turnbuckles.
b. Remove the access panel located on top of the fuselage, aft of the vertical fin.
c. With the control cable tension relieved, disconnect the control cable from the rudder horn.
d.
Disconnect the rudder trim control rod.
e. Swing the rudder and remove the hinge bolts.
f. Pull the rudder back and up removing the unit.
4-38. INSTALLATION OF RUDDER. (Refer to Figure 4-6.)
a. Put the rudder in position, install and torque the hinge bolts.
b. Position the rudder trim control rod, install bolt and torque.
c. Connect the rudder control cables to the rudder horn.
d. Adjust the control cable turnbuckle previously loosened to obtain proper cable tension as given
in Section V, with the rudder and control wheels centered.
e. Check rudder for proper operation.
f. Install fuselage and cabin access panels.
4-39. RUDDER TRIM TAB.
4-40. REMOVAL OF RUDDER TRIM TAB. (Refer to Figure 4-6.)
a. Disconnect the control rod at the tab.
b.
Remove the hinge bolts securing the tab.
4-41. INSTALLATION OF RUDDER TRIM TAB. (Refer to Figure 4-6.)
a. Place the trim tab in position and secure with bolts and bushings. Torque to 38 in. lbs includes 18
in. lbs friction torque.
b.
Attach the tab control rod.
4-42. VERTICAL STABILIZER (FIN).
Reissued: 10/12/79
STRUCTURES
1F7