NTSB Identification: LAX85LA400.
The docket is stored on NTSB microfiche number 30187.
Accident occurred Saturday, September 21, 1985 in WATSONVILLE, CA
Aircraft: BELL 47G-2, registration: N2874B
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.

DURING AN AG FLT, AT ABT 5 FT AGL, THE PLT HEARD A LOUD BANG, THE ENG OVERSPED, & ALL PWR TO THE ROTOR BLADES WAS LOST. THE PLT ATTEMPTED TO IMMEDIATELY LAND IN THE UNDERLYING FIELD, BUT HAD INSUFFICIENT ALTITUDE/AIRSPEED TO AUTOROTATE. THE ACFT TOUCHED DOWN, BOUNCED, & THE MAIN ROTOR BLADES FLEXED DOWN & SEVERED THE TAIL BOOM. EXAM OF THE CLUTCH REVEALED THAT POOR CONTACT WAS BEING MADE BETWEEN THE SHOES & DRUM. EXAM OF THE FREE WHEELING UNIT REVEALED IT CONTAINED NUMEROUS ROLLERS WHICH WOULD NOT LOCK. IT IS UNKNOWN WHICH COMPONENTS'S FAILURE WAS PRIMARY.

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

ROTOR DRIVE SYSTEM,CLUTCH ASSEMBLY..UNDETERMINED

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

ROTOR DRIVE SYSTEM,FREEWHEELING UNIT(OTHER)..UNDETERMINED


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