Hartzell HC-D2MV20-3 Series, Руководство пользователя и журнал учета

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inspection and check
61-00-40
propeller owner’s Manual
140
Page 5-20
Rev. 2 Jun/12
C. Foreign Object Strike/Ground 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.