NTSB Identification: LAX91LA387.
The docket is stored on NTSB microfiche number 45500.
Accident occurred Saturday, September 07, 1991 in PHOENIX, AZ
Probable Cause Approval Date: 08/13/1993
Aircraft: Rotorway EXEC 90, registration: N7456T
Injuries: 1 Fatal.

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 HELICOPTER WAS A FACTORY BUILT PROTOTYPE FOR A NEW KIT DESIGN AND THE PILOT WAS A COMPANY EMPLOYEE. SHERIFFS DETECTIVES REPORTED THAT THE PILOT HAD BEEN ARRESTED THE EVENING BEFORE FOR DRIVING UNDER THE INFLUENCE OF ALCOHOL. ON THE AFTERNOON OF THE ACCIDENT, THE PILOT'S ROOMMATE TELEPHONED THE AIRPORT AND SAID THAT THE PILOT WAS NOT TO FLY BECAUSE HE 'WAS ON SOMETHING.' THE PILOT ARRIVED AT THE AIRPORT AND TOOK THE HELICOPTER. ACCORDING TO THE COMPANY OWNER, THE PILOT STOLE THE HELICOPTER. WITNESSES AT THE LAKE REPORTED THAT THE HELICOPTER ARRIVED OVER THE LAKE AND BEGAN TO PERFORM A SERIES OF AEROBATIC LIKE MANEUVERS. THE HELICOPTER REPORTEDLY BUZZED SEVERAL BOATS IN THE LAKE AT A LOW LEVEL. AFTER ABOUT 30 MINUTES OF MANEUVERING, THE WITNESSES SAID THE HELICOPTER SEEMED TO STOP, THEN DIVE INTO THE LAKE. SHERIFF'S DETECTIVES REPORTED THAT TWO SUICIDE NOTES WERE FOUND IN THE PILOT'S AUTOMOBILE PARKED AT THE AIRPORT.

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

UNDETERMINED.

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