BHT-412-MM-2
5-00-00
Page 196 Rev. 26 01 JUN 2018
Export Classification C, ECCN EAR99
If the sudden stoppage conditional inspection is the
result of crash damage, all rotating system
components shall be considered unserviceable and
non-repairable. Crash damage is any damage
sustained beyond the scope of that identified in
conditional inspection (Paragraph 5-36)
A blade strike is due to contact of main or tail rotor
blades with the ground, water, snow, dense
vegetation or other object sufficient to cause blade
damage. However, not all blade strikes will meet the
sudden stoppage definition.
A blade strike which causes damage, dents or tear,
to a main rotor or tail rotor blade skin behind the
spar due to impact with a small foreign object (e.g.
small stone or low mass item) that did not contact
the leading edge and would not cause a sudden
deceleration of the drive system is not considered a
sudden stoppage, but may require the affected
blade(s) to be repaired.
A rotating system torque spike is defined as any
other incident which causes a severe torque spike in
the drive system. These incidents include, but are
not limited to foreign object ingestion through the
gear mesh in any gearbox.
If overhaul evaluation is specified, complete both the
conditional inspection and normal inspection
procedures (as applicable) for that component listed
in BHT-412-CR&O.
Components removed from a helicopter for
evaluation following a sudden stoppage shall be
evaluated as an interrelated group. Removal
records accompanying each component shall cross
reference part and serial numbers of other drive
system components removed for evaluation.
5-38. SUDDEN STOPPAGE — POWER ON OR OFF (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
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