Propeller !2 Flashcards
(24 cards)
TSO
Time since overhaul
TSN
time since new
TBO
Time between overhaul
wood storage
storage area should be cool, dark, dry, and well ventilated
Aircraft Operator
is required to keep a log of TSN and TSO
when wood propeller is stored
it should be placed in a horizontal position to keep the moisture evenly distributed throughout the wood
Metal propeller
particularly prone to metal fatigue caused by the high dynamic loads.
aluminum propeller should be cleaned by
mild soap
and water using a soft brush or cloth to
remove all dirt and grease
Grease leaks
indicate damage of the blade attachment seals
by using a combination of round and half round files
Defects on a blade is leading and trailing
edges may be dressed out
aluminum propeller
heavier than wood propeller
vibrations occur
it may be necessary to remove the propeller for a detailed inspection of the hub area
aluminum propellers should not be washed
Acid or caustic cleaning materials should never be used
dye penetrant
used to inspect cracks
The maximum allowable repair size of a
typical surface defect on a blade face or back
1/16-inch-deep by 3/8-inch-wide by 1-inch long
maximum allowable size of a typical repair on a propeller edge
1/8-inch-deep by no more than 1 1/2 inches in length
transverse cracks of any size render an aluminum alloy blade
unrepairable
any damage to the shank is considered as
critical
bent blades
repairable
typical torque value is 35 footpounds or higher for metal propellers and
approximately 25 foot-pounds for wood
propellers
to reduce the
wear and tear
disassembly is
not recommended at these inspection
intervals
