Aft Stabilator Trim Controls Removal; Aft Stabilator Trim Controls Installation; Stabilator Trim Rigging And Adjustment - Piper PA-44-180 SEMINOLE Maintenance Manual

REMOVAL OF AFT STABILATOR TRIM CONTROLS. (Refer to Figure 27-22.)
1. Remove the access panel to the aft section of the fuselage.
2. Block the trim cables at the first set of pulleys forward of the cable turnbuckles in the aft section of the
fuselage by the method shown in Figure 27-21.
3. Disconnect the cable at the turnbuckles in the aft section of the fuselage.
4. Remove cable guard from pulley cluster and cable guards from pulley cluster.
5. Remove the fin tip by removing attachment screws.
6. Disconnect the push rod by removing the attaching hardware securing push rod to screw.
7. Remove bolts, washers, bushings and nuts securing forward end of barrel. Remove snap ring to free
aft end of barrel.
8. Draw the trim cable from the fuselage and up the fin.
INSTALLATION OF AFT STABILATOR TRIM CONTROLS. (Refer to Figure 27-22.)
1. Wrap the trim barrel by first laying the center of the trim cable (as measured equally from each end to
the center of the cable) in the slot of the barrel. Bring the half of the cable to be used on the right side
through the diagonal slot in the flange at the forward end of the barrel and wrap aft in a clockwise
direction 7 wraps to the center of barrel. Bring the half of the cable to be used on the left side through
the diagonal slot in the aft end of the barrel and wrap forward in a counterclockwise direction 7 wraps
to the center of barrel. ( Refer to Figure 27-23 .)
2. Block the cable by clamping between two pieces of wood laid next to the wraps to prevent unwrap-
ping. Fabricate block with a notch so hardware can be installed.
3. Lubricate the bearings and install barrel per exploded view given in Figure 27-22. Install the barrel
using any combination of AN960-10, AN960- 10L and AN960PD 10L washers to achieve free barrel
rotation with trim cable rigged and tensioned.
4. Rotate the cables down the fin into the fuselage through the two pulley clusters and attach the ends to
the forward trim cables.
5. Install all cable guards.
6. Remove the blocks that are holding the forward cables tight and aft cables at the barrel.
7. Set cable tension and check rigging and adjustment. Check safety of all turnbuckles.
8. Install fin tip and secure with screws.
9. Install the access panel to the aft section of the fuselage.
RIGGING AND ADJUSTMENT OF STABILATOR TRIM. (Refer to Figure 27-22.)
1. Level the airplane. (Refer to Leveling, Chapter 8.)
2. Check for proper stabilator trim cable tension as given in Figure 27-20. If cables were disconnected,
rotate the control wheel several times to allow the cables to seat and recheck tension.
3. Secure the stabilator in neutral position: stabilator chord line parallel with front seat tracks.
4. To obtain correct travels, if incorrect, adjust by disconnecting the rod end and turning the end in or out
as required. Travel adjustments which cannot be corrected at the rod end adjustment require the repo-
sitioning of the screw in the barrel. A screw position of approximately 1.38 inches of screw exposure
at the aft end of the barrel is suggested as a preliminary neutral setting from which final adjustments
can be made at the rod end. (Refer to Figure 27-21.)
5. If required, adjust the stabilator tab push rod to streamline the tab with the stabilator. This is the neu-
tral position of the tab.
6. Turn the trim control wheel to its full up and full down position alternately. Travel of the tab from its
neutral position should match the travels shown in Figure 27-20.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
1L17
PPS50033
27-30-04
Page 27-39
Revised: June 20, 1995