NTSB Identification: SEA88LA093.
The docket is stored on NTSB microfiche number 36061.
Accident occurred Wednesday, May 11, 1988 in PRINEVILLE, OR
Probable Cause Approval Date: 03/13/1989
Aircraft: Hughes 269C, registration: N751AM
Injuries: 1 Minor,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 PILOT REDUCED POWER FOR LANDING AND A HIGH SINK RATE DEVELOPED. THE PILOT ATTEMPTED TO INCREASE POWER TO CORRECT THE SINK RATE BUT GOT NO RESPONSE. ROTOR RPM'S WERE DIMINISHING, SO THE PLT LOWERED THE COLLECTIVE TO REGAIN RPM'S. THE PILOT ELECTED MAKE AN AUTOROTATION. THE PILOT HELD THE HELICOPTER IN A FLARE UNTIL AIRSPEED WAS EXHAUSTED. AT ABOUT 5 FEET AGL THE HELICOPTER DESCENDED VERTICALLY UNTIL IT STRUCK THE GROUND, BREAKING OFF THE RIGHT SKID. THE HELICOPTER THEN ROLLED ONTO ITS RIGHT SIDE STRIKING THE MAIN ROTOR BLADES.

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

AUTOROTATION..IMPROPER..PILOT IN COMMAND

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

PROPER DESCENT RATE..EXCESSIVE..PILOT IN COMMAND

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

THROTTLE/POWER CONTROL..DELAYED..PILOT IN COMMAND


Contributing Factors

WEATHER CONDITION..HIGH DENSITY ALTITUDE


Index for May1988 | Index of months