Stabilator Removal And Installation; Stabilator Trim Tab Removal And Installation; Stabilator Balance - Piper PA-44-180 SEMINOLE Maintenance Manual

STABILATOR AND TAB.
STABILATOR.
REMOVAL AND INSTALLATION OF STABILATOR. (Refer to Figure 55-1.)
The stabilator assembly can be removed by following the procedure given below.
1. Remove the fin tip attachment screws and disconnect the light at quick disconnect then remove tip
assembly.
2. Disconnect trim push rod and push rod attached to stabilator balance weight arm.
3. Remove balance weight arm from stabilator by removing attachment bolt at the forward and aft arm
mounting fitting.
4. Remove the two hinge bolts at the pivot points and remove the stabilator.
5. Reinstall the stabilator in reverse of removal instructions.
6. Check attaching hardware for proper installation.
STABILATOR AND TRIM TAB.
REMOVAL AND INSTALLATION OF STABILATOR TRIM TAB. (Refer to Figure 55-1.)
The trim tab can be removed by following the procedure given below.
1. Disconnect the trim push rod from the trim horn.
2. Remove the hinge pins and remove the trim tab.
3. Reinstall the trim tab in reverse of removal instructions, with new hinge pins.

STABILATOR BALANCE.

The stabilator has been statically balanced at the time of installation at the factory and normally should not
require rebalancing. Where possible the stabilator was set with the balance weight on the heavy side of the limits
to permit limited repair or paint touch-up without adjusting the balance weight. It should be noted, however, that
spare stabilators are delivered unpainted and the static balance will not necessarily fall within the limits provided.
This is more pronounced on the stabilators and rudders. The completed stabilator including paint should be
within the limits given in Figures 55-2. If the surface is not to be painted, the balance weight will probably
require adjustment. Replacement stabilators or stabilators that have been repainted or repaired should be
rebalanced according to the procedures given in this chapter. The static balance of the surfaces must be as
specified in the figures referenced above.
Before balancing any control surface, it must be complete including tip, trim / servo tabs as applicable and tab
actuating arms or push rods with bearings as applicable and all optional equipment which is mounted on or in the
control surface when it is flown, including paint, position lights and wiring, static wicks, scuff boots, etc.
If optional equipment is added or removed after balancing, the control surface must be rebalanced. During
balancing, trim/servo tabs must be maintained in the neutral position.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
3B10
5 5 - 2 3 - 0 0
Page 55-01
Revised: May 15, 1989