Piper Comanche PA-24 Service Manual page 209

4-7a. Aileron Nose Rib 100 Hour Inspection.
NOTE: The following incorporates the inspection requirements of Piper Service Letter No. 850, dated
April 18, 1979, as referenced in AD 79-20-10.
For airplanes which have not installed Piper Kit No. 763-893, each 100 hours time-in-service inspect the
two aileron nose ribs/bulkheads in the area where the aileron balance arm attaches for cracks. Inspect
both right and left ailerons as follows:
NOTE: If the aileron spar and aileron reinforcement plates show no evidence of cracks, and if Piper Kit
No 763-893 is installed, this recurring inspection requirement is relieved.
A. Remove aileron from aircraft.
B. Using a 10X magnifier, visually inspect the two aileron nose bulkheads in the area where the
aileron balance weight arm attaches for cracks.
C. If no cracks are found reinstall aileron. Rig per paragraph 5-11 and lubricate per paragraph 2-85.
D. If cracks are found in either bulkhead, remove the balance arm and bulkhead, and with 10X
magnifier, visually inspect the spar and the aileron reinforcement plate (see Comanche Parts
Catalog, P/N 752-464) for cracks.
1. If cracks are found in an aileron nose bulkhead only, order and install Aileron Nose Rib
Reinforcement Kit, Piper Kit No. 763-893, before further flight.
2. If any cracks are found in the Aileron Spar (P/N 20213-00) or Aileron Reinforcement Plate
(P/N 20234-22), replace it (them), as well as installing Kit No. 763-893, above.
3. Reinstall balance arm and then reinstall aileron. Rig per paragraph 5-11 and lubricate per
paragraph 2-85.
E. Make an appropriate logbook entry documenting completion of this inspection.
4-8. Removal Of Flap (Manually Operated).
A. Remove the access plate to the flap bellcrank located on the rear-under side of the wing at
approximately the center of the flap.
B. Disconnect the flap control rod end bellcrank, return spring at the bellcrank.
C. Remove the hinge bolts.
D. Pull the flap straight off the wing.
4-9. Removal Of Flap. (PA-24-250 Electrically Operated And PA-24-260)
A. Remove the access plate to the flap bellcrank located on the rear-under side of the wing at
approximately the center of the flap. Remove the main gear wheel well splash pan.
B. Located at the rear inboard portion of the right wing is a combination flap return and step lock. By
entering through the wheel well, release spring tension and disengage the step lock. In the left wing
is a flap return spring only, release the spring tension.
C. Disconnect the flap control rod and bellcrank return spring at the bellcrank.
D. Under the inboard end of the right flap is an access plate to the step lock return cable. Back the adjusting
nut off the cable end. The left wing, disconnect the flap return cable at the leading edge of the flap.
E. Remove the top rollers from the flap brackets. After the top rollers are removed, the flap will swing
forward allowing access for the removal of the lower rollers. Remove the flap.
04/01/09
PIPER COMANCHE SERVICE MANUAL
1E7
IV - STRUCTURES