NTSB Identification: NYC84LA320.
The docket is stored on NTSB microfiche number 26688.
Scheduled 14 CFR
Accident occurred Saturday, September 22, 1984 in NEW YORK, NY
Aircraft: AEROSPATIALE SA-360C, registration: N49533
Injuries: 9 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.

DURING APPROACH TO HELIPORT, THE PLT HEARD TWO LOUD 'POPS' FROM THE ENGINE. THE PLT ACTIVATED THE EMERGENCY FLOATS AND CONTINUED THE APPROACH. THE PLT STATED THAT THE 'POPPING', RECOGNIZED AS A COMPRESSOR STALL STARTED AGAIN ON FINAL. HE LOWERED THE COLLECTIVE AND THE ACFT DESCENDED RAPIDLY WHICH TERMINATED WITH A HARD LANDING. THE TAIL BOOM BECAME DISCONNECTED FROM THE MAIN BODY AND THE ROTOR BLADE STRUCK THE VERTICAL FIN. THERE WAS NO INDICATION OF THE REASON FOR THE COMPRESSOR STALL.

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

ENGINE ASSEMBLY..FAILURE,PARTIAL

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

COLLECTIVE..IMPROPER USE OF..PILOT IN COMMAND

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

PROPER DESCENT RATE..EXCEEDED..PILOT IN COMMAND

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

FLARE..NOT ATTAINED..PILOT IN COMMAND

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

ENGINE ASSEMBLY..UNDETERMINED

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

ROTOR RPM..INADEQUATE..PILOT IN COMMAND

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

EMERGENCY PROCEDURE..INADEQUATE..PILOT IN COMMAND


Contributing Factors

DIVERTED ATTENTION..PILOT IN COMMAND


Contributing Factors

MISC ROTORCRAFT,EMERGENCY FLOATATION GEAR..ENGAGED

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