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

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PIPER CHEROKEE SERVICE MANUAL
V - SURFACE CONTROLS 01/31/08
2B16
8. Route the cable ends into the fuselage and attach the ends to the mating end of the forward cable.
9. Remove the blocks holding the forward cable tight and the aft cables at the barrel.
10. Set cable tension and check rigging and adjustment per paragraph 5-23. Check safety of
turnbuckles.
11. The trim indicator cable may be installed by attaching one end to the lower end of the trim
screw (Refer to Figure 5-8 for correct location.) and looping the cable around the pulley below
the trim screw. Install the cotter pin cable guard at the pulley. Attach other end of the cable to
the indicator wire, and at the same time make adjustments given in paragraph 5-23.
12. Install tail cone fairing and secure with screws.
13. Install the access panel to the aft section of the fuselage.
5-23. RIGGING AND ADJUSTMENT OF STABILATOR TRIM. (OVERHEAD CONTROL.)
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. PA-28-150, -160, -180, Serial Nos. 28-1 to 28-1410 incl. (The exception being those airplanes with
Piper Kit No. 756 930, Stabilator Trim Modification, installed. Airplanes with this kit installed,
refer to step b.) (Refer to Figure 5-8.)
1. Level the airplane. (Refer to Leveling, Section II.)
2. Check for proper stabilator trim cable tension as given in Table V-II. If the cables were
disconnected, rotate control crank (1) several times to allow the cables to seat and recheck
tension.
3. Position the stabilator against its down stop. Ascertain that the stabilator travel is correctly set
according to Table V-II.
4. Turn the trim crank until the aft end of the turnbuckle of the right trim cable is positioned
approximately one-half inch forward of the double pulley cluster at the top of the rear
bulkhead at station 228.3.
5. Check that the trim screw trunnion (12) is turned down until it contacts the top of the lower screw
stop of the trim assembly If the trunnion is not contacting the stop, and the fork (14) between the
trim support bracket (13) and the trim control arm (15) is not disconnected, -disconnect the arm
from the tab by removing the connecting bolts. With the turnbuckle still at the one-half
dimension from the pulley, turn the screw down until the trunnion contacts the stop.
6. With the stabilator positioned against its down stop, adjust the trim actuating arm until the
trailing edge of the tab aligns with the trailing edge of the stabilator. Adjust by loosening the
jam nut on the fork of the control arm and turning the fork in or out as required.
7. Connect the control arm to the tab and secure with bolts.
8. Move the stabilator to the neutral position and secure. 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.
9. Turn the trim crank until the trailing edge of the tab aligns with the trailing edge of the
stabilator.