Piper PA-28-161, Maintenance Manual

Page: 386 / 1104

PIPER AIRCRAFT, INC.
PA-28-161, WARRIOR III
MAINTENANCE MANUAL
PAGE 12
Nov 30/06
2I12
27-30-00
(i) Remove blocks holding forward cables tight and holding aft cables at barrel.
(j) Set cable tension and check rigging and adjustment per Rigging and Adjustment, below.
Check safety of all turnbuckles and install pulley guard pins (38).
(k) Install tail cone and secure with screws.
(l) Install access panel to aft section of fuselage.
C. Rigging and Adjustment (Refer to Figure 4.)
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.
(1) Level the airplane. (Refer to Section 8-20-00.)
(2) Check for proper stabilator trim cable tension as given in Chart 2, 27-00-00. If cables were
disconnected, rotate control wheel several times to allow the cables to seat and recheck
tension.
(3) Secure the stabilator in neutral position. To find neutral, place a rigging tool on the upper
surface of the stabilator as shown in Figure 2. Zero a bubble protractor, set it on the rigging tool
and tilt the stabilator until the bubble is centered.
(4) 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.
(5) 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.
(6) Check the rod end (26) on the tab actuating arm (28) for approximately six threads forward of
the jam nut (27).
(7) Connect the links to the trim screw and secure with bolt, washers and nut.
(8) Turn the trim control wheel until the trim tab streamlines with the neutral stabilator. If required,
adjust the stabilator tab pushrod until the stabilator trim control wheel indicates neutral.
(9) Check the bubble of the protractor over the neutral tab and then check tab travels as given in
Chart 2, 27-00-00. 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.
(10) 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.
(11) Secure the jam nut (27) on the actuating arm rod end.
(12) Turn the trim wheel to full travel in each direction and check for turnbuckle clearance
interference between turnbuckles and pulleys, and location of tab indicator.
(13) With the stabilator held securely against either stop, measure the freeplay of the stabilator tab
at the tab trailing edge. Total freeplay shall not exceed 0.06 inch.