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N267KA accident description

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Crash location 34.476667°N, 118.460278°W
Nearest city Santa Clarita, CA
34.391664°N, 118.542586°W
7.5 miles away
Tail number N267KA
Accident date 17 Dec 2008
Aircraft type Kaman K-1200
Additional details: None

NTSB Factual Report

On December 17, 2008, about 0930 Pacific standard time, a Kaman Aerospace Corporation, K-1200 helicopter, N267KA, sustained substantial damage after being upset by a wind gust while standing with engines and rotors operating near Santa Clarita, California. The certificated commercial pilot, the sole occupant, was not injured, while a ground crewman was killed. Visual meteorological conditions prevailed at the time of the accident, and a flight plan was not filed. The proposed flight was planned to operate in accordance with 14 Code of Federal Regulations (CFR) Part 91, with Whiteman Airport (WHP), Los Angeles, California, the reported destination.

In a statement submitted to the NTSB investigator-in-charge (IIC), as well as in a telephone conversation with the IIC, the pilot reported that about 30 seconds after starting the helicopter's engine and while in ground idle, the mechanic disconnected the auxiliary power unit (APU). The pilot stated "...then the helicopter began to lift on the right side. I applied full right cyclic to counter the lifting. I ran out of cyclic and was on the stops. The aircraft was still lifting to the left. The right wheel then came off the ground and the tail of the aircraft lifted over the nose." The pilot revealed that the [main rotor] blades impacted a fuel truck, then departed the [helicopter] before striking the mechanic. The helicopter subsequently flipped over and came to rest inverted. The pilot stated that the helicopter was facing a north-northwest direction and the wind was from the east-southeast at a velocity of between 10 to 15 knots. The pilot further stated that the helicopter's main rotor blades were destroyed and that the tail boom was bent and twisted about 90 degrees to the right of the aircraft's longitudinal axis. There was no post crash fire. The pilot stated that gusty wind conditions in the area were not uncommon.

According to the Kaman K-1200 Federal Aviation Administration (FAA) Approved Flight Manual, page 5-12, Figure 5-9, Prevailing Wind Envelope, the maximum right quartering tailwind condition for takeoff and landing is from 17 knots to 25 knots. (Refer to the attached Prevailing Wind Envelope.)

NTSB Probable Cause

The helicopter's encounter with a gusty crosswind condition during engine start that exceeded the helicopter's demonstrated wind envelope.

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