Piper Aircraft Corporation Cherokee 140 PA-28-140, Service Manual

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PIPER CHEROKEE SERVICE MANUAL
V - SURFACE CONTROLS 01/31/08
2B22
5-29. RIGGING AND ADJUSTMENT OF STABILATOR TRIM. (FLOOR CONTROL.) PA-28-180, Serial
Nos. 28-4378 and up; PA-28-235, Serial Nos. 28-10720 and up; and PA-28R. (Refer to Figure 5-10.)
a. Level the airplane. (Refer to Leveling, Section II.)
b. Check for proper stabilator trim cable tension as given in Table V-II. If cables were disconnected,
rotate control wheel several times to allow the cables to seat and recheck tension.
c. Secure the stabilator in neutral position. To find neutral, place a rigging tool on the upper surface of
the stabilator as shown in Figure 5-7. Zero a bubble protractor, set it on the rigging tool and tilt the
stabilator until the bubble is centered.
d. With the stabilator centered, turn the trim wheel (1) until the aft end of the turnbuckle (10) of the
right trim cable (8) is approximately two inches forward of the double pulleys (13) at the top of the
rear bulkhead at station 228.3.
e. Check that the trim screw (23) is turned down until the cotter pin stop in the top of the screw is
contacting the plate (17) on the horizontal support rib (16) of the trim assembly. If the stop is not
contacting the plate, the links (25) between the screw (23) and the trim control arm (28) are not
disconnected, disconnect the two by removing the connecting nut, washers and bolt (24). With the
turnbuckle still at the two inch dimension from the pulley, turn the screw down until the pin
contacts the plate.
f. Check the rod end (26) on the tab actuating arm (28) for approximately six threads forward of the
jam nut (27).
g. Connect the links to the trim screw and secure with bolt, washers and nut.
h. Turn the trim control wheel until the trim tab streamlines with the neutral stabilator.
i. Check the bubble of the protractor over the neutral tab and then check tab travels as given in Table
V-II. The degree of travel on the protractor is determined by taking the difference between the
protractor reading at neutral and up, and neutral and down. The bubble must be centered at each
reading with the airplane level.
j. To obtain correct travels, if incorrect, adjust by disconnecting the links (25) at the actuating arm rod
end (26) and turning the end in or out as required. Reconnect links to rod end.
k. Secure the jam nut (27) on the actuating arm rod end.
l. Turn the trim wheel to full travel and check for turnbuckle clearance and location of tab indicator.
5-30. RUDDER AND STEERING PEDAL ASSEMBLY.
5-31. REMOVAL OF RUDDER AND STEERING PEDAL ASSEMBLY. (Refer to Figure 5-11.)
a. Remove the access panel to the aft section of the fuselage.
b. Relieve rudder and stabilator cable tension by loosening one of the rudder and stabilator cable
turnbuckles in the aft section of the fuselage.