NTSB Identification: MKC85LA164.
The docket is stored on NTSB microfiche number 27993.
Accident occurred Tuesday, July 02, 1985 in DENISON, IA
Aircraft: Brantly Helicopter B-2, registration: N6799D
Injuries: 1 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.

PLT REPORTS THAT THE ENG IDLE SETTING WAS TOO LOW AND THE ENG QUIT WHEN HE REDUCED POWER DURING A PRACTICE AUTOROTATION. THE ACFT TOUCHED DOWN HARD AND THE MAIN ROTOR CONTACTED TAIL BOOM.

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

THROTTLE/POWER CONTROL..IMPROPER

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

FLARE..MISJUDGED..PILOT IN COMMAND

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

MAINTENANCE,ADJUSTMENT..IMPROPER

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