NTSB Identification: FTW82FA071
14 CFR Part 91: General Aviation
Accident occurred Friday, February 26, 1982 in SAN MARCOS, TX
Probable Cause Approval Date: 02/26/1983
Aircraft: ROBINSON R22, registration: N9061Z
Injuries: 1 Fatal.

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 aircraft accident report.

THE HELICOPTER WAS OBSERVED ROTATING IN A COUNTER CLOCKWISE MOTION. A SMALL EXPLOSION WAS SEEN AT THE TAIL SECTION WITH PIECES FLYING OFF. THE OUTBOARD SECTIONS OF THE T/R BLADES WERE FOUND ABOUT 800 FT FROM THE MAIN WRECKAGE. EXAMINATION OF THE FRACTURES INDICATES A HIGHLY ABNORMAL STRESS CONDITION WAS PRODUCED IN THE T/R. THE AUSTIN FSS WAS REPORTING WIND GUSTS OF 27K.

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

ROTOR SYSTEM,TAIL ROTOR BLADE..OVERLOAD

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

ROTOR SYSTEM,TAIL ROTOR BLADE..FAILURE,TOTAL

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

ROTOR SYSTEM,TAIL ROTOR BLADE..UNDETERMINED

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

ROTOR DRIVE SYSTEM,TAIL ROTOR GEARBOX(90 DEG)..OVERLOAD

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

ROTOR DRIVE SYSTEM,TAIL ROTOR GEARBOX(90 DEG)..FAILURE,TOTAL

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

ROTOR DRIVE SYSTEM,TAIL ROTOR GEARBOX(90 DEG)..UNDETERMINED


Contributing Factors

WEATHER CONDITION..GUSTS

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