Accident Details
Witnesses observed a helicopter lifting an external load of Christmas trees. The aircraft began a left turn from north to west, then started rotating to the left. After approximately 1 to 1.5 rotations, it impacted the ground on its left side. Local winds at the time were reported by witnesses as from the southeast at 5 to 15 knots.
Investigation Findings
On-site investigators found no evidence of airframe or engine malfunction. However, they noted dirt and packed mud in the engine compressor. The pilot, who was seriously injured, had no recollection of the accident sequence.
Engine Testing
During a test run at the manufacturer's facilities, the engine would not produce more than normal cruise power. The manufacturer's test report stated that the only observable cause for this was extensive foreign object damage to the inlet guide vanes and first stage compressor blades. Additionally, the engine fuel control and governor were functionally tested and found to be slightly out of limits at certain test points. The manufacturer stated that the exceedances observed would not significantly affect engine power output.