NTSB Identification: NYC86LA100.
The docket is stored on NTSB microfiche number 33079.
Accident occurred Saturday, April 05, 1986 in PITTSBURGH, PA
Probable Cause Approval Date: 04/25/1988
Aircraft: AEROSPATIALE SA316B, registration: N2354
Injuries: 3 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE PILOT-IN-COMMAND LIFTED OFF THE HELIPAD VERTICALLY TO AN ALTITUDE OF 30 FEET AT WHICH TIME HE EXPERIENCED A POWER LOSS. HE BACKED UP THE HELICOPTER 20 FEET AND ALLOWED IT TO YAW TO THE RIGHT AS IT DESCENDED TO THE HELIPAD. HE LANDED ON THE HELIPAD HARD WITH LOW ROTOR RPM. INSPECTION OF THE ENGINE REVEALED THE GEAR AND SPLINE ASSEMBLY IN THE REDUCTION GEARBOX HAD STRIPPED THEREBY DISCONNECTING THE GEARBOX FROM THE TURBINE SECTION.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

REDUCTION GEAR ASSY,REDUCTION GEAR..FAILURE,TOTAL


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