Anaktuvuk Pass, AK, USA
N4040W
de Havilland DHC-2 MK.1
The airline transport certificated pilot was transporting passengers from a remote lake in a float-equipped airplane under Title 14, CFR Part 135. He said that during takeoff he passed his predetermined point to abort the takeoff without becoming airborne, and felt that he had to proceed with the takeoff or hit the shoreline. The pilot said that he was able to become airborne, but struck the shore of the lake with the airplane's floats just after liftoff. He stated that he was concerned about damage to the floats from the impact with the shore, and elected to land on a hard surface runway at the destination airport. The float structure collapsed during landing, resulting in substantial damage to the fuselage. There were no known mechanical anomalies with the airplane prior to the accident.
On August 1, 2006, about 1730 Alaska daylight time, a float-equipped, de Havilland DHC-2 Mk.1 airplane, N4040W, sustained substantial damage when it struck the shore during takeoff from a remote lake, about 50 miles south of Anaktuvuk Pass, Alaska. The airplane was being operated by Brooks Range Aviation, Bettles, Alaska, as a visual flight rules (VFR) passenger flight under Title 14, CFR Part 135, when the accident occurred. The airline transport certificated pilot and the five passengers were not injured. Visual meteorological conditions prevailed, and company flight following procedures were in effect. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on August 1, the Bettles Airport manager said the float-equipped accident airplane landed on the hard-surfaced runway at Bettles. The manager said the pilot told her that he had struck the shore during takeoff from a lake, and feared the floats would not support the airplane during a water landing, and elected to land on the hard-surface runway. The manager reported that during landing the float's supporting structure collapsed, and the airplane sat on its tail. On August 3, the director of operations for the company told the IIC he believed that damage to the airplane was limited to the floats and support structure, however the airplane had been put back on wheels, and the airplane was being ferried to a repair facility to have the fuselage examined and repaired, if necessary. On August 10, an FAA maintenance inspector who examined the repairs made to the airplane, told the IIC that an aft fuselage bulkhead had to be cut and spliced at the bottom, and that several additional fuselage stringers had to be cut and repaired, or replaced. In a written statement to the NTSB dated August 27, the pilot wrote that he "hesitated" at the takeoff abort point long enough that he felt he had no choice but to continue the takeoff, and that the floats hit the bank just as the airplane became airborne.
The pilot's failure to abort the takeoff at his predetermined reference point, which resulted in a collision with the shore during takeoff-initial climb, and structural damage to the airplane.
Source: NTSB Aviation Accident Database
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