NTSB Identification: ATL86FA084.
The docket is stored on NTSB microfiche number 30825.
Accident occurred Monday, March 03, 1986 in BULLARD, GA
Aircraft: BELL B-214-B-1, registration: N114RM
Injuries: 1 Minor.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

A HELICOPTER INVOLVED IN A LOGGING OPERATION WAS IN PROCESS OF LIFTING A LOG WHEN CREW REPORTED A 'LOUD EXPLOSION' AND A LOSS OF POWER WAS EXPERIENCED. AN AUTOROTATIVE LANDING WAS ACCOMPLISHED AND A SMALL ENGINE FIRE WAS EXTINGUISHED. THE 1ST STAGE TURBINE DISC HAD SEPARATED AND WAS UNCONTAINED. DEBRIS HAD DAMAGED THE MAIN ROTOR BLADES AND COWLING DURING ITS DEPARTURE FROM THE HELICOPTER. EVIDENCE OF A THREAD LURE WAS REPORTED ON THE MALE AND FEMALE THREADS FOR THE DISC BOLTS. THIS IS THE SECOND REPORTED IGT TURBINE DISC FAILURE ON THIS ENGINE, BOTH WERE BEING OPERATED BY THIS COMPANY AT THE TIME.

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

TURBOSHAFT ENGINE,GAS GENERATOR TURBINE..SEPARATION

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

MAINTENANCE,INSTALLATION..IMPROPER..OTHER PERSON

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

TURBOSHAFT ENGINE,GAS GENERATOR TURBINE..FAILURE,TOTAL


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