Propeller Owner’s Manual
147
MAINTENANCE PRACTICES
61-00-47
Page 6-23
Rev. 16 May/20
C. Procedure
WARNING:
CLEANING AGENTS (ACETONE,
#700 LACQUER THINNER, AND MEK),
ARE FLAMMABLE AND TOXIC TO
THE SKIN, EYES, AND RESPIRATORY
TRACT. SKIN AND EYE PROTECTION
ARE REQUIRED. AVOID PROLONGED
CONTACT. USE IN WELL VENTILATED
AREA.
CAUTION:
ANY REFINISHING PROCEDURE
CAN ALTER PROPELLER BALANCE.
PROPELLERS THAT ARE OUT OF
BALANCE MAY EXPERIENCE EXCESSIVE
VIBRATIONS WHILE IN OPERATION.
(1) Using a clean cloth moistened with acetone,
#700 lacquer thinner, or MEK, wipe the surface of the
blade to remove any contaminants.
(2) Permit the solvent to evaporate.
CAUTION 1: EXCESSIVE SANDING ON COMPOSITE
BLADES WILL CAUSE “FUZZING” OF THE
KEVLAR
®
MATERIAL. THIS CAN RESULT
IN A ROUGH FINISH AND/OR DAMAGE TO
THE BLADE.
CAUTION 2: BE SURE TO SAND/FEATHER THE
EXISTING COATINGS TO PREVENT
EXCESSIVE PAINT BUILDUP.
(3) Using 120 to 180 grit sandpaper, sand to feather the
existing coatings away from the eroded or repaired area.
(a) Erosion damage is typically very similar on all blades
in a propeller assembly. If one blade has more
extensive damage, e.g. in the tip area, sand all the
blades in the tip area to replicate the repair of the
most severely damaged blade tip. This practice is
essential in maintaining balance after refinishing.
(4) Using acetone, #700 lacquer thinner, or MEK, wipe the
surface of the blade.
