Kaman K-1200 accident near Dayville, OR
On March 17, 2006, a Kaman K-1200 (helicopter) was involved in an accident near Dayville, OR. 1 person died. Damage to the aircraft: substantial.
- Date
- March 17, 2006
- Place
- Dayville, OR
- Aircraft
- Kaman K-1200 · Helicopter
- Injuries
- 1 fatal, 0 serious, 0 minor
- Damage
- Substantial
- Position
- 44.568°N, 119.465°W
- NTSB ID
- 20060327X00354
NTSB summary
HISTORY OF FLIGHT On March 17, 2006, about 0935 Pacific standard time, a Kaman K-1200 helicopter, N263KA, collided with terrain in an uncontrolled descent following a loss of engine power while hovering out of ground effect about 16 nautical miles north of Dayville, Oregon. The commercial pilot, the sole occupant, received fatal injuries, and the helicopter sustained substantial damage. The helicopter was registered to and operated by Grizzly Mountain Aviation Inc. of Prineville, Oregon. Visual meteorological conditions prevailed and no flight plan was filed for the 14 CFR Part 133 flight. The helicopter was being used for long-line logging and operations for the day had commenced about 0700. Witnesses reported to local authorities that the pilot set down a load of logs and stated on the radio that he was going to reposition the helicopter to land at the service area. At this point, the helicopter was about 300 feet above ground level (agl), hovering, with the 200-foot long line still attached. The witnesses then heard the engine "shutdown." They observed the helicopter descend vertically with the rotors visibly slowing down, nose over to an inverted position, impact the ground inverted, and roll onto its left side. There was no fire. PERSONNEL INFORMATION The pilot held a commercial pilot certificate with a helicopter rating. Additionally, he was rated as a private pilot in single engine land airplanes. His most recent medical certificate was a second class medical issued on April 5, 2005, with the limitation, must wear corrective lenses. According to information provided
Probable cause
The improper overhaul of the reduction gear box assembly and improper installation of the N1 seal and nut assembly lockcup by maintenance personnel, which resulted in failure of the reduction gear box and a total loss of engine power. A contributing factor was the pilot's failure to maintain adequate rotor rpm following the power loss, which resulted in an uncontrolled descent to ground impact.
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Browse: Oregon
Source: NTSB aviation accident database (US government, public domain). Findings may be preliminary or later revised by the NTSB. Not a complete global record.
