Piper Arrow IV Turbo Maintenance Manual page 276

RIGGING AND ADJUSTMENT OF WING FLAPS.
1. Place the flap handle in full forward position.
2. If not previously removed, remove the bottom half of the rear seat.
3. To adjust the flap up stop and step lock, loosen the jam nut of the right torque tube stop screw, located
in the floor opening along the outer end of the flap torque tube, and turn the stop screw to obtain
approximately .60 of an inch between the stop fitting and the bearing block as measured along the top side of
the screw. (Refer to Figure 27-20.) It may be necessary to loosen the adjustment screw of the left stop.
4. Place a .125 spacer between the stop fitting and the end of the screw. Determine that when pressure is
applied down on the flap, it will remain in the uplock position. If it extends, turn the adjustment screw out a
few threads at a time until the flap remains in the uplock position with the spacer inserted. Tighten the jam nut.
5. Rotate the left stop adjustment screw until it contacts the stop fitting. Tighten the jam nut.
6. Set the flap control cable tension (handle next to floor, 0 degrees) as given in Figure 27-22 at the
turnbuckle that is attached to the lower end of the flap handle in the floor tunnel. To do this and if not
previously removed, remove the flap handle cover and enough tunnel carpet to remove the tunnel cover just aft
of the handle. Adjust and resafety the turnbuckle.
Do not rotate the torque tube while retensioning the cable or
tighten tight enough to allow tube to be pulled away from its
stops.
7. To check up-neutral position of the flaps, place a flap rigging tool as shown in Figure 27-21 against the
underside of the wing and flap as close as possible to the outboard end of the flap without contacting any
rivets. The tool must be positioned parallel with the wing ribs with the aft end of the tool even with the trailing
edge of the flap. (This tool may be fabricated from dimensions given in Chapter 95.)
8. With the flap control rod connected between the torque tube crank arm and the flap, check that the
surface of the wing contacts the tool at its forward surface and at the spacer, and the aft end of the flap contacts
the aft end of the tool. The flap is neutral at this position.
9. Should the three points not contact, loosen the jam nuts on each end of the control rod and rotate the
rod until the three points contact. Apply a slight up pressure against the trailing edge of the flap while making
this adjustment. After adjustment, retighten the jam nuts.
10. Check and adjust the other flap in a like manner.
In the event of wing heaviness during flight, the flap on the side
of the heavy wing can be adjusted down from neutral to remedy
this condition by lengthening the control rod. Check the
inspection hole in each rod end to ascertain that there are
s u fficient threads remaining and a wire cannot be inserted
through these holes. Rod ends without check holes, maintain a
minimum of .375 of an inch thread engagement. Do not raise the
flap of the other wing above neutral.
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
—NOTE—
—NOTE—
1L12
27-50-03
Page 27-41
Revised: August 8, 1984