Piper Cherokee LANCE, Service Manual

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PIPER CHEROKEE SIX / LANCE SERVICE MANUAL
03/27/08 V - SURFACE CONTROLS
1H15
h. Remove the blocks that are holding the forward cables tight and aft cables at the barrel.
i. Set cable tension and check rigging and adjustment per paragraph 5-21. Check safety of all
turnbuckles.
j. Install the tail cone and secure with screws.
k. Install the access panel to the aft section of the fuselage.
5-21. RIGGING AND ADJUSTMENT OF STABILATOR TRIM. (Refer to Figure 5-8.)
(PIR-PPS50005-1, Rev. AF.)
CAUTION: VERIFY FREE AND CORRECT MOVEMENT OF STABILATOR TAB. WHILE IT
WOULD SEEM SELF-EVIDENT, FIELD EXPERIENCE HAS SHOWN THAT THIS
CHECK IS FREQUENTLY MISINTERPRETED OR NOT PERFORMED AT ALL.
ACCORDINGLY, UPON COMPLETION OF STABILATOR TRIM RIGGING AND
ADJUSTMENT, VERIFY THAT THE STABILATOR TAB MOVES UP WHEN THE
TRIM WHEEL IS TRIMMED DOWN; AND, THAT THE STABILATOR TAB MOVES
DOWN WHEN THE TRIM WHEEL IS TRIMMED UP.
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 5-6. 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 (l) 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 259.0.
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, and the links (25) between the screw (23) and the trim control arm (28) are not
disconnected, disconnect the two by removing the 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.
1. Turn the trim wheel to full travel and check for turnbuckle clearance and location of tab indicator.