Piper Navajo PA-31 Service Manual page 122

PIPER NAVAJO SERVICE MANUAL
v. Check brake fluid level; bleed brakes (refer to Bleeding Brakes, Section VII) and ascertain that
there are no fluid leaks.
w. Check fuel system for leaks and flow.
x. At the top of the wing, rivet the fillet fairing to the wing and fuselage. Apply a bead of Minnesota
Mining and Manufacturing Sealant EC750 or equivalent along the edge of the wing root fillet at the fuselage
and wing skins, starting at the leading edge and extending aft over the top of the trailing edge.
y. At the fairing between the underside of the fuselage and wing, turn the three adjusting screws
that draw the fairing against the underside of the wing butt and ascertain that there is a rub strip between
the wing and fairing.
z. Reinstall access plates and panel at the underside of fuselage and wing and leading edge of wing.
aa. Install the floor panels and spar covers. Check to determine that there is at least a .187 inch
minimum clearance between the spar tunnel and crossfeed line. If no clearance exists, displace the crossfeed
line aft to obtain this clearance.
ab.
Install the fuel selector panel and ascertain that no wires interfere with the selector controls or
are confined between the control panel and the crossfeed line.
4-26. EMPENNAGE GROUP.
4-27. ELEVATOR.
NOTE
Any time service is accomplished on the elevator control system, a
friction check must be made to insure that the friction is within
limits. (Refer to Paragraph 4-91.)
4-28. REMOVAL OF ELEVATOR. (Refer to Figure 4-6.)
a.
Remove the screws that attach the fuselage tail cone; pull the cone back far enough to disconnect
the navigation light wires, and then remove the tail cone.
b.
At the right elevator, disconnect the trim tab control rod.
c.
Remove the bolts that attach the elevator torque tube bracket to the elevator.
d.
Remove hinge bolts and remove elevator.
e. To remove the elevator torque tube assembly, after the elevators have been removed, disconnect
the elevator push-pull rod at the control arm.
f. Remove the hinge bolt and separate the torque tube assembly from its mating hinge bracket.
4-28a. REMOVAL AND INSTALLATION OF ELEVATOR DE-ICING BOOTS. These deicing boots are
secured to the leading edge of each elevator balance arm by ten screws and washers. Should it be necessary
to remove and replace these boots, insure cleaning, and recoating the under surface with a sufficient
amount of Sil-Glyde to give a smooth film of lubricant to the area to be covered by the boot.
4-29. INSTALLATION OF ELEVATOR. (Refer to Figure 4-6.)
a. Place the elevator torque tube assembly in position with its mating hinge bracket.
b.
Install hinge bolt assembly; torque and safety.
c.
The elevator push-pull rod may be connected to the arm of the torque tube assembly.
d. Place the elevator in position; install bolt assembly and torque.
e. Install bolts attaching the torque tube bracket and elevator. Ascertain that the elevator halves
align and tighten bolts.
Revised: 9/23/80
STRUCTURES
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