NTSB Identification: DEN88LA137.
The docket is stored on NTSB microfiche number 36950.
Accident occurred Sunday, June 26, 1988 in MISSOULA, MT
Probable Cause Approval Date: 08/08/1989
Aircraft: BELL 206B3, registration: N2754A
Injuries: 2 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.

A CHECK AIRMAN AND A COMMERCIAL PLT WERE PERFORMING AN INSTRUCTIONAL FLT. DURING CLIMBOUT AFTER A PRACTICE AUTOROTATION, THE ENGINE OUT AUDIO AND LIGHT WARNING ACTIVATED. BOTH PILOTS VERIFIED AN ACTUAL ENGINE OUT AND ENTERED AN AUTOROTATION. THE HELICOPTER TOUCHED DOWN ON SOFT TERRAIN WITH SOME FORWARD MOVEMENT AND LOW ROTOR RPM. THE MAIN ROTOR BLADES CONTACTED THE TAIL BOOM AND SEVERED IT. A POST ACCIDENT INSPECTION SUPERVISED BY AN FAA AIRWORTHINESS INSPECTOR, FAILED TO REVEAL ANY EVIDENCE TO EXPLAIN THE REPORTED ENGINE FAILURE.

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

FLARE..IMPROPER..PILOT IN COMMAND(CFI)

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

REASON FOR OCCURRENCE UNDETERMINED

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

ROTOR RPM..NOT MAINTAINED..PILOT IN COMMAND(CFI)



Contributing Factors

TERRAIN CONDITION..SOFT

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