NTSB Identification: DEN88FA106.
The docket is stored on NTSB microfiche number 37110.
Accident occurred Saturday, May 07, 1988 in CORTEZ, CO
Probable Cause Approval Date: 10/03/1989
Aircraft: BELL 47G-3B1, registration: N8455E
Injuries: 1 Fatal,1 Serious.

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.

THE PLT SAID THAT HE HAD JUST TAKEN OFF AND REACHED AN ALT OF ABOUT 300 FT WHEN HIS COLLECTIVE CONTROL WENT 'LIMP'. THE HELICOPTER ENTERED A DESCENT, PARTIALLY CONTROLLED BY THE PLT USING THROTTLE AND CYCLIC CONTROL INPUTS. THE HELICOPTER TOUCHED DOWN IN SOFT MUD. THE HELICOPTER ROCKED FORWARD AND THEN AFT CAUSING THE MAIN ROTOR BLADES TO SEVER THE TAIL BOOM AND ALSO STRIKE THE GROUND. A POST ACCIDENT FIRE ERUPTED DESTROYING THE HELICOPTER. SEVERAL BROKEN PARTS WERE EXAMINED AT A LAB. THERE WAS NO EVIDENCE OF FATIGUE OR CORROSION ON THE FRACTURED SURFACES.

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

ROTORCRAFT FLIGHT CONTROL,COLLECTIVE CONTROL..FAILURE,TOTAL


Contributing Factors

TERRAIN CONDITION..SOFT

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