NTSB Identification: CHI88FA214.
The docket is stored on NTSB microfiche number 38450.
Accident occurred Saturday, August 20, 1988 in HAMPTON, IL
Probable Cause Approval Date: 01/24/1990
Aircraft: HUGHES 269B, registration: N9499F
Injuries: 3 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.

WHILE IN CRUISE FLIGHT AT 150-300 FT AGL, THE CRANKSHAFT FRACTURED. THE PILOT ATTEMPTED AN AUTOROTATIONAL LANDING IN A SUITABLE FIELD 1500 FEET FROM THE POSITION WHERE THE POWER LOSS OCCURRED. THE EVIDENCE INDICATES THAT WHILE EN ROUTE TO THIS INTENDED LANDING AREA, THE PILOT ALLOWED THE ROTOR RPM TO DECAY AND LOSS OF CONTROL OCCURRED. THE HELICOPTER DESCENDED OUT OF CONTROL UNTIL GROUND IMPACT.

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:

ADEQUATE ROTOR RPM..NOT MAINTAINED..PILOT IN COMMAND

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

LACK OF TOTAL EXPERIENCE IN TYPE OPERATION..PILOT IN COMMAND


Contributing Factors

ENGINE ASSEMBLY,CRANKSHAFT..FATIGUE


Contributing Factors

ENGINE ASSEMBLY,CRANKSHAFT..FRACTURED

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