NTSB Identification: NYC82IA036
Scheduled 14 CFR Part 135: Air Taxi & Commuter
Incident occurred Friday, February 12, 1982 in JAMAICA, NY
Probable Cause Approval Date: 02/12/1983
Aircraft: de Havilland DHC-6-100, registration: N80701
Injuries: 7 Uninjured.

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

DURING CRUISE FLIGHT, THE AIRCRAFT EXPERIENCED A POWER FAILURE AND FIRE IN THE LEFT ENGINE. THE CREW SECURED THE ENGINE AND DISCHARGED THE FIRE EXTINGUISHER WITHOUT EFFECT ON THE FIRE. DURING DESCENT TO JFK INTERNATIONAL THE FIRE EXTINGUISHED ITSELF. A NORMAL SINGLE ENGINE LANDING WAS MADE AND THE PASSENGERS DEPLANED WITHOUT INJURY. INVESTIGATION REVEALED THAT A COMPRESSOR TURBINE BLADE HAD FAILED IN FATIGUE DAMAGING POWER TURBINE BLADES, THE POWER TURBINE VANE RING AND THE COMPRESSOR TURBINE VANE RING. IN ADDITION THE PROPELLER REDUCTION GEARBOX WAS DAMAGED. THE ORIGIN AND NATURE OF THE FATIGUE IN THE TURBINE BLADE WAS NOT DETERMINED. IT WAS DETERMINED THAT THE FAILED BLADE WAS INSTALLED AT OVERHAUL, ABOUT 843 HOURS BEFORE THE INCIDENT.

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

COMPRESSOR ASSEMBLY,BLADE..FATIGUE

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