NTSB Identification: CEN11LA370
14 CFR Part 137: Agricultural
Accident occurred Wednesday, May 25, 2011 in Lakeville, MN
Probable Cause Approval Date: 11/07/2012
Aircraft: BELL 47G-3B-1, registration: N96SH
Injuries: 1 Serious.

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 stated that the helicopter experienced a total loss of engine power while maneuvering during an aerial application operation. He performed a forced landing to a swamp, which resulted in substantial damage to the airframe. Examination of the engine revealed that the compressor discharge pressure bleed line between the governor and the fuel control was leaking at a loose B-nut.

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

The loss of engine power due to a loose B-nut on the compressor discharge pressure bleed line.

Full narrative available

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