Propeller Owner’s Manual
136
INSPECTION AND CHECK
61-00-36
Page 5-23
Rev. 2 Feb/17
(d) Regardless of the degree of damage, make an entry in
the propeller logbook about the lightning strike.
(e) The propeller must be removed from the aircraft,
disassembled, evaluated, and/or repaired by a
certified propeller repair station with the appropriate
rating
for flight beyond the temporary operation limits
granted above.
C. Foreign Object Strike
(1) General
(a) A foreign object strike can include a broad spectrum
of damage, from a minor stone nick to severe
ground impact damage. A conservative approach in
evaluating the damage is required because there
may be hidden damage that is not readily apparent
during an on-wing, visual inspection.
(b) A foreign object strike is defined as:
1 Any incident, whether or not the engine is
operating, that requires repair to the propeller
other than minor dressing of the blades.
Examples of foreign object strike include
situations where an aircraft is stationary and
the landing gear collapses causing one or more
blades to be significantly damaged, or where a
hangar door (or other object) strikes the propeller
blade. These cases should be handled as foreign
object strikes because of potentially severe
side loading on the propeller hub, blades and
retention bearings.
2 Any incident during engine operation in which
the propeller impacts a solid object that causes
a drop in revolutions per minute (RPM) and
also requires structural repair of the propeller
(incidents requiring only paint touch-up are
not included). This is not restricted to propeller
strikes against the ground.
3 A sudden RPM drop while impacting water,
tall grass, or similar yielding medium, where
propeller blade damage is not normally incurred.
