Piper PA-28-161, Maintenance Manual

Page: 398 / 1104

PIPER AIRCRAFT, INC.
PA-28-161, WARRIOR III
MAINTENANCE MANUAL
PAGE 6
Nov 30/06
2I24
27-50-00
(4) Check and adjust flap neutral:
(a) With a rigging tool as shown in Figure 3:
NOTE.: This tool may be fabricated from dimensions given in Figure 4.
1 To check the 0° (neutral) position of the flaps, place the flap rigging tool 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.
2 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.
3 If the three points do 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, tighten
jam nuts.
(b) Or, with the flap handle in the “flaps up” position (i.e. - next to floor), adjust each flap push
rod so that the chord line of the flap forms a 0° ± 1° angle with the wing chord at the
outboard end of the flap. Maintain a light “up” pressure on the underside of the flap when
taking the measurement.
(5) Measuring from the “flaps up” or neutral position attained in the previous paragraph, and
maintaining light “up” pressure on the underside of the flap, check flap travel at each of the
remaining three positions. Travel shall be as specified in Chart 2, 27-00-00.
3. Torque Tube/Push Rod Distortion Inspection
If flaps have been extended at or above V
FE
, inspect the flap torque tube arms and pushrods for
evidence of distortion.
A. If the paint is cracked or peeling anywhere along the torque tube arm or pushrod, torsional
movement has occurred.
B. Remove the paint and inspect for cracks:
(1) In the welds at the arm on the torque tube end.
(2) In the rod ends and pushrod tube.
(3) Use a dye penetrant method of inspection.
C. If cracks are not found, repaint the part(s) and reinstall.
D. If cracked, replace the affected part(s).