NTSB Identification: ATL87LA267.
The docket is stored on NTSB microfiche number 35072.
Accident occurred Wednesday, September 30, 1987 in MANSFIELD, OH
Probable Cause Approval Date: 01/11/1989
Aircraft: ENSTROM F-28A, registration: N29GC
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.

THE PLT REPORTED THAT THE HELICOPTER MADE AN UNCOMMANDED TURN TO THE RIGHT AND ROLLED TO THE LEFT AS SHE WAS HOVER-TAXIING AWAY FROM THE HANGAR TOWARD THE TAKEOFF AREA. THE ACFT SUBSEQUENTLY IMPACTED THE TERRAIN AND CAME TO REST ON ITS LEFT SIDE. POST-CRASH EXAM OF THE ACFT REVEALED NO EVIDENCE OF PRE-EXISTING MECHANICAL FAILURE OR MALFUNCTION. INVESTIGATION REVEALED THAT THE WIND AT THE TIME WAS BLOWING FROM 320 DEG AT 15 KTS GUSTING TO 22 KTS, AND THAT THE HELO LIFTOFF POINT WAS ON THE DOWNWIND SIDE OF THE HANGAR. THE FAA BASIC HELICOPTER HANDBOOK AC61-13B NOTES THAT TURBULENCE IS LIKELY TO BE FOUND NEAR THE GROUND OF THE DOWNWIND SIDE OF BLDGS WHENEVER THE WIND VELOCITY EXCEEDS 10 MPH (8.7 KTS).

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

DIRECTIONAL CONTROL..NOT MAINTAINED..PILOT IN COMMAND

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

COMPENSATION FOR WIND CONDITIONS..INADEQUATE..PILOT IN COMMAND


Contributing Factors

WEATHER CONDITION..GUSTS


Contributing Factors

WEATHER CONDITION..TURBULENCE

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