Piper PA-24 Comanche Service Manual page 403

FIGURE 78·2. TYPICAL NICKS AND
REMOVAL
METHODS
•
•
PIPER COMANCHE SERVICE MANUAL
EXAGGERATED VIEW OF NICKS
IN
LEADIN~
EDGE.
•
RECOMMENDED METHOD FOR REMOVING
NICKS IY RIFFI.E FILE AND CROCUS CLOTH.
BLEND DEEPEST PORTlON OF NICK INTO
lEADING EDGE AUGNMENT WITH SMOOTH
CURVES.
EXAGGERATED VIEW OF NiCK
IN FACE OF BLADE.
SECTION AA·
NICK IN FACE OF BLAOE
REMOVED BY FILE AND
CROCUS CLOTH AS RECOM·
MENDED.
•
iB·9. C1anint. InspectioD And Repair Of
PropeUer.
(Refer to Figure 7B·2.)
a. Check for eil and
JftUC
leaks.
b. Clean the spinner. propeller bub interior and exterior. and blades with a noncorrosivt solvent.
c. Inspect the hub partS for cracks.
d.
Steel hub pam should not be pennitted to
fUR.
Usc
:Lluminum paint to touch up. if necessary. or
replate durinl overhaul.
e. Check
all
visible pIttS for
wear
and safety.
f. Check blades to determine Whether they
tum
freely on the hub pivot
rube.
This can
be done
by
rock in, the blades back and forth thtoup the sliIbt Ueedom allowed by the pitch change mechanism. If
they Ippeat tisht and
o&re
properly lubricated. the propeUer should be disulcmbled by an luthonzed service
center.
g. Inspect bladcs for
c1amaac
or cracks. Nicks in leadinl
edca
of blades should be rued OUt and ill
edtes rounded.
IS
cracks sometimcs
stilt
from such places.
Usc
fIDe emery cloth for finishin,.
h.
Ie is recommended that for severe dam• • intcma1 repairs and replacement of parts. the propeller
should be rderred to the HaraeU Factory or Certified Repair Scation.
I.
Grease blade hub throUlb zetk fittinp. Remove one of the
twO
fittings for nch propeller blade.
alternate the next time. Apply grease d:ItouJh the zerlt fitting until fresh
pase
appears at the iittmg hole of
the removed tittiq. Care should be taken to avoid blowln' OUt bub gaskets.
POWER PlANT
ISSU ED: 8/18/72
2
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