NTSB Identification: CHI86FER11.
The docket is stored on NTSB microfiche number 33455.
Accident occurred Monday, June 16, 1986 in BROOTEN, MN
Aircraft: BELL 47G-5, registration: N8122J
Injuries: 1 Serious.

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.

ACCORDING TO THE PILOT, THE HELICOPTER COLLECTIVE CONTROL FAILED TO RESPOND TO A CLIMB INPUT TO LEVEL OFF AFTER A DESCENT FOR AN AGRICULTURAL SWATH RUN. FIRE AND IMPACT DAMAGE TO THE HELICOPTER WAS EXTENSIVE, HOWEVER ONE BROKEN ROD END IN THE COLLECTIVE CONTROL SYSTEM FAILED THROUGH DUCTILE OVERSTRESS.

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

ROTORCRAFT FLIGHT CONTROL,COLLECTIVE CONTROL ROD..FAILURE,TOTAL

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

ROTORCRAFT FLIGHT CONTROL,COLLECTIVE CONTROL ROD..OVERLOAD

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