NTSB Identification: FTW83LA297.
The docket is stored on NTSB microfiche number 23266.
Accident occurred Monday, June 27, 1983 in LAFAYETTE, LA
Aircraft: BELL 206L-1, registration: N3904L
Injuries: 1 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 HELICOPTER MADE A HARD PRECAUTIONARY LANDING AFTER THE PLT NOTED THE ROTOR RPM AND N2 WOULD BLEED OFF WHEN COLLECTIVE PITCH WAS INCREASED TO 80 PERCENT TORQUE. THE PLT RETURNED TO THE ARPT AND ELECTED TO AUTOROTATE INSTEAD OF LANDING WITH POWER AVAILABLE. THE AUTOROTATION RESULTED IN A HARD LANDING. THE POWER LOSS WAS FOUND TO BE CAUSED BY FAILURE OF THE FULL CONTROL LEVER TO OPEN FULLY. THIS WAS THE RESULT OF A MECHANIC OVERTIGHTING THE THROTTLE LINKAGE WHEN A PLT COMPLAINED OF THROTTLE CREEPING OPEN. THIS CREEPING IS CONSIDERED NORMAL ON A BELL 206L-1 ACCORDING TO THE OPERATOR.

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

THROTTLE/POWER LEVER,LINKAGE..MOVEMENT RESTRICTED

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

MAINTENANCE,ADJUSTMENT..IMPROPER..COMPANY MAINTENANCE PERSONNEL

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

THROTTLE/POWER LEVER,LINKAGE..BINDING(MECHANICAL)

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

THROTTLE/POWER LEVER,LINKAGE..PENETRATED

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

ROTOR RPM..NOT MAINTAINED..PILOT IN COMMAND

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

FLARE..MISJUDGED..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..SOFT


Contributing Factors

PRECAUTIONARY LANDING..ATTEMPTED..PILOT IN COMMAND


Contributing Factors

AUTOROTATION..PERFORMED..PILOT IN COMMAND

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