Piper Navajo PA-31 Service Manual page 229

195
1052
1. STOP BOLT 4 POINTER
2. RUDDER HORN 5. RUDDER
3. RIGGING TOOL 6 ELEVATOR
Figure 5-11.
Clamping Rudder Pedals
Figure 5-12. Installation of Rudder
in Neutral Position
Rigging Tool
1.
Clamp the rudder pedals to align in a lateral position as shown in Figure 5-11.
2.
Adjust the turnbuckles (4) at fuselage station 100.0 to obtain proper cable tension, per
Table V-I, and to align the rudder at neutral position. Neutral position of the rudder may be established by
aligning vertically the forward overhang at the upper portion of the rudder with the vertical fin or with the
use of the fabricated rudder rigging jig. (A rigging jig and pointer may be fabricated from specifications
given in Figure 5-18.)
c.
Rudder travel adjustment with the use of the fabricated rudder rigging tool (Refer to Figure
5-12) may be accomplished as follows:
1.
Level the airplane longitudinally and laterally. (Longitudinal leveling is not mandatory if a
propeller protractor is used for this adjustment.)
2.
Allow the elevator to remain in its down position.
3.
Position the jig on the elevator torque tube and slide it to the left until the centerline on the
jig plate aligns with the centerline of the airplane.
4.
Set a bubble protractor to 29
°
28' and position it on the centerline of the jig plate. (This
angle assures rudder travel measurement perpendicular to the ruder hinge centerline.)
5.
With protractor still set to 29
°
28', center the bubble by adjusting the screws at the aft end
of the jig plate. (Keep jig legs tight to elevator torque tube.)
6.
Slide the pointer into the trailing edge of the rudder with the point approximately .125 inch
from plate.
7.
Set rudder with stops to the degree of travel as given in Table V-I and lock stops.
NOTE
If provisions are provided for safety wiring the nut and screw on the
rudder hing assembly, safety wire with MS33540 as shown in Figure
5-7a.
Revised: 9/23/80
SURFACE CONTROLS
PIPER NAVAJO SERVICE MANUAL
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