BHT-206A/B-SERIES-MM-1
5-00-00
30 APR 2013 Rev. 14 Page 157
Export Classification C, ECCN EAR99
5-52. HARD LANDING
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
DATE: __________________W.O. _____________________
FACILITY: __________________________________________
HELICOPTER S/N: ___________________________________
REGISTRY NO.: _____________________________________
TOTAL TIME:_______________________________________
SIGNATURE:________________________________________
HARD LANDING
A hard landing is defined as any incident in which impact of
helicopter with ground causes severe pitching of main rotor.
Blades involved in this type of hard landing must be thoroughly
inspected visually. If no obvious damage is discovered, blades
may be retained in service for continued usage.
If, on a hard landing, either main rotor blade comes into contact
with ground, tailboom, or other foreign object, both main rotor
blades are to be regarded as having been involved in a sudden
stoppage and must be returned to a blade repair station for
inspection.
Airframe landing skids and crosstubes will deform and yield
under load forces in excess of 2.5 Gs. If cabin fuselage contacts
the ground, G forces in the fuselage increase abruptly. If
following a hard landing, cabin fuselage is resting on the ground
or shows evidence of having touched the ground, it is
considered to have sustained a 10 G load.
Components removed from helicopter for evaluation
following a hard landing 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.
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