Figure 8-1 . Typical Nicks and Removal Method
8-5. PROPELLER.
8-6. REMOVAL OF PROPELLER.
a. Insure master and magneto switches are off.
b. Move fuel selector to off position and place mixture control in idle cut-off.
c. Note the position of each component to facilitate reinstallation.
d. Remove the screws attaching the spinner assembly and remove the spinner.
e. Remove the safety wire that secures the six attaching bolts and remove the bolts. The propeller is now free
to be removed.
8-7. CLEANING, INSPECTION AND REPAIR OF PROPELLER.
a. Clean the spinner, back plate and propeller surfaces with a non-corrosive solvent, and inspect for nick,
scratches, corrosion and cracks.
b. Nicks in the leading edges of the blades should be filed out and all edges rounded, as cracks sometimes
start from such places. Use fine emery cloth for finishing. (Refer to Figure 8-1 for propeller blade care.) A
propeller with several nicks, scratches, corrosion or cracks should be returned to a propeller overhaul shop or the
manufacturer for inspection and repair.
c. Each blade face should be sanded lightly and painted, when necessary, with a flat black paint to retard
glare. A light application of oil or wax may be applied to the surfaces to prevent corrosion.
A969
NOTE: RECOMMENDED METHOD FOR
REMOVING NICKS, CRACKS AND SCRATCHES IS
BY USING RIFFLE FILE AND/OR CROCUS CLOTH
BLEND DEEPEST PORTION
OF NICKS INTO LEADING
EDGE ALIGNMENT WITH
SMOOTH CURVES
EXAGGERATED VIEW OF
NICK IN LEADING EDGE
AFTER
BEFORE
CROSS - SECTION
AFTER REPAIR
CROSS - SECTION
BEFORE REPAIR
EXAGGERATED VIEW OF
SURFACE CRACK
EXAGGERATED VIEW OF
NICK IN FACE OF BLADE
PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY. 28, 1989
POWER PLANT
1J7