Piper Cherokee Six Service Manual page 89

3-11. INSPECTION OF INDUCTION AIR INLET DUCT AND ALTERNATE HEAT
DUCT.
This inspection should be accomplished at the next 25 hours of operation and at each
subsequent 100 hours of operation thereafter. This inspection is a visual inspection of the
external surface of the subject ducts and does not require duct removal and replacement to
accomplish the inspection. Inspect the ducts for evidence of deterioration as follows:
a. Inspect the external surface of the ducts for loose or broken strings.
b. Inspect the ducts for loose or displaced supporting wire.
c. Inspect the ducts for signs of wear or perforation.
Should any of the above conditions exist, remove and replace the affected duct or ducts
prior to the next flight. Refer to PA-32 Cherokee Parts Catalog for replacement part
numbers.
CHECK FOR
POSSIBLE CRACKS
ON BOTH SIDES
OF TORQUE LINKS
Figure 3-4. Inspection of Main Landing Gear Torque Links
3-12. INSPECTION OF MAIN LANDING GEAR TORQUE LINKS. (PA-32-260 & 300)
This inspection should be accomplished within the next 100 hours and at intervals not
to exceed 500 hours of operation from previous inspection.
The main landing gear torque links should be inspected for possible cracks which may
appear on the areas referenced in Figure 3-4. These cracks may form just behind the large
boss which attaches to the strut or to the wheel, and in the center of the link progressing
toward the edge. The following steps should be used to make this inspection:
a. Remove paint from the area to be inspected, using acetone, MEK, or any suitable
commercial paint remover which does not contain wax.
b. Allow the cleaned part to dry thoroughly.
c. If cracks do not readily appear, inspect by one of the following methods:
1. 10X magnifying glass.
2. Dye check or other penetrant inspection.
d. Should cracks be detected, replace defective torque links prior to further flight.
e. If no cracks appear, make proper log book entry and return aircraft to service.
Revised: 7/29/77 INSPECTION
PIPER CHEROKEE SIX SERVICE MANUAL
1D17