Piper COMANCHE PA-24-180 Service Manual page 405

PIPER COMANCHE SERVICE MANUAL
RECOMMENDED METHOD FOR REMOVING SECTION AA -
NICKS BY RIFFLE FILE AND CROCUS CLOTH
NICK IN FACE OF BLADE
BLEND DEEPEST PORTION OF NICK INTO
REMOVED BY FILE AND
FIGURE 7-2. TYPICAL NICKS AND REMOVAL METHODS
7B-9 Cleaning, Inspecion And Repair Of Propeller. (Refer to Figure 7B-2.)
a. Check for oil and greae leaks.
b. Clean the spinner, propeller hub interior and extenor, and blades with a noncorrosve solvent.
c. Inspect the hub parts for cracks.
d. Steel hub parts should not be permnued co rus. Use aluminum paint to couch up, if necessary. or
replate during overhaul.
e.
Check all visible parts for wear and safety.
f.
Check blades to determine whether they turn freely on the hub pivot tube. This can be done by
rocking the blades back and forth through the slight freedom allowed by the pitch change mechanism. If
they appear tight and are properly lubricaed, the propeller should be disssembled by an authorized service
center.
g. Inspect blades for damage or cracks. Nicks in leading edges of blades should be filed out and all
edges rounded. as cracks sometimes start from such places. Use fine emery cloth for finishing.
h. It is recommended that for severe damage, internal repairs and replacement of pars. the propeller
should be referred to the Harzell Factory or Certified Repair Station.
i.
Grease blade hub through zerk fittings. Remove one of the two fittings for each propeller blade.
alternate the next time. Apply grease through the zerk fitting unil fresh grease appears at the fitting hole of
the removed fiting. Care should be taken to avoid blowing out hub gaskets.
POWER PLANT
ISSUED: 8/18/72
2 E23