NTSB Identification: FTW87GA083.
The docket is stored on NTSB microfiche number 32920.
Accident occurred Saturday, March 21, 1987 in ODESSA, TX
Probable Cause Approval Date: 03/30/1988
Aircraft: BELL 47G-3B-1, registration: N62462
Injuries: 2 Uninjured.

: 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 public aircraft accident report.

INVESTIGATION REVEALS THE HELICOPTER TOUCHED DOWN ON THE HEEL OF ITS SKIDS, LEFT SKID FIRST, AND AT A SLIGHTLY LOW ROTOR RPM. THE TAIL BOOM THEN MOVED UPWARD WHILE THE MAIN ROTOR BLADES FLEXED DOWNWARD. THE MAIN ROTOR BLADES CONTACTED AND SEVERED THE TAIL BOOM, ALLOWING THE TAIL ROTOR ASSEMBLY TO FALL TO THE GROUND. FRESH MARKS WERE NOTED ON THE MAIN ROTOR HUB ASSEMBLY WHERE IT HAD BANGED AGAINST THE MAIN ROTOR DROOP STOPS.

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

FLIGHT CONTROLS..IMPROPER USE OF..PILOT IN COMMAND

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

ROTOR RPM..INADEQUATE..PILOT IN COMMAND


Contributing Factors

AUTOROTATION..PERFORMED..PILOT IN COMMAND

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