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ASN Wikibase Occurrence # 44161
Last updated: 26 January 2020
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Type:Silhouette image of generic C177 model; specific model in this crash may look slightly different
Cessna 177
Owner/operator:Hawkeye Helicopters LLC
Registration: N34200
C/n / msn: 17701698
Fatalities:Fatalities: 1 / Occupants: 1
Aircraft damage: Written off (damaged beyond repair)
Location:Blackburn, MO -   United States of America
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Departure airport:Lawrence, KS (LWC)
Destination airport:Osage City, KS (53K)
Investigating agency: NTSB
The airplane was conducting a pipeline patrol when it hit a power line and subsequently impacted the terrain. A witness reported that she observed the airplane flying west, paralleling Highway 20 at a low altitude. It was about two power line poles in height above the ground and the airplane was flying slow. The witness reported, "All of a sudden, the left wing went down and the right wing went up." The witness described the angle of bank as a perpendicular position, a 90-degree vertical bank. The airplane turned left into a gully and the left wing impacted the top wire of a power line. The inspection of the wreckage revealed that the outboard portion of the left wing at the aileron/flap juncture had separated at a 45-degree angle. A downed power line wire was found tangled in the wreckage. The post accident inspection of the airplane revealed no preexisting anomalies that could be associated with a pre-impact condition. An on-site inspection of the accident site revealed that 35 to 40 feet tall power lines provided power to several nearby residential customers. A power line crossed the highway near the site of the accident. There were no other power lines observed in the area that crossed the highway. The power line the airplane impacted paralleled the south (left) side of the highway.
Probable Cause: The pilot's failure to maintain obstacle clearance from the power line during low altitude maneuvering. A factor was the power line.



Revision history:

28-Oct-2008 00:45 ASN archive Added
21-Dec-2016 19:24 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
05-Dec-2017 09:08 ASN Update Bot Updated [Operator, Other fatalities, Source, Narrative]

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