Dehavilland BEAVER DHC 2 accident near Thorne Bay, AK
On July 24, 2013, a Dehavilland BEAVER DHC 2 (airplane) was involved in an accident near Thorne Bay, AK. 3 people were seriously injured. Damage to the aircraft: substantial.
- Date
- July 24, 2013
- Place
- Thorne Bay, AK
- Aircraft
- Dehavilland BEAVER DHC 2 · Airplane
- Injuries
- 0 fatal, 3 serious, 0 minor
- Damage
- Substantial
- Position
- 55.825°N, 132.885°W
- NTSB ID
- 20130724X00828
Official records · ANC13LA068
- Public docket: reports, statements and exhibits from the investigation
NTSB summary
On July 24, 2013, about 1140 Alaska daylight time, a float-equipped de Havilland DHC-2, N4787C, collided with trees following a loss of engine power near Lake Galea, about 15 miles northwest of Thorne Bay, Alaska, on Prince of Wales Island. The airline transport pilot and two passengers received serious injuries, one passenger was uninjured, and the airplane sustained substantial damage. The on-demand air taxi flight was operated by Promech Air, LLC, under the provisions of 14 Code of Federal Regulations (CFR) Part 135 with a company visual flight rules flight plan filed. Visual meteorological conditions prevailed. The flight departed Ketchikan Harbor Seaplane Base (5KE), Ketchikan, Alaska, at 1100 and was destined for Shipley Bay, Alaska. According to the pilot, the airplane was in cruise flight at an altitude of about 1,500 feet above mean sea level (msl), which he estimated was about 1,200 feet above ground level (agl) in the area over which he was flying, when he heard a loud "boom" and a series of loud and continuous "pop-pop-pop" noises. The pilot said that he reported to the company via the radio that he had lost an engine cylinder and was going to land. The pilot said that everything was shaking and that he did an immediate 180-degree turn to land on the lake that he had just overflown. The pilot stated that, as he turned the airplane on a base leg for the lake, he put in two pumps of flaps, and, about that time, the engine lost power completely. The pilot estimated that the amount of time that elapsed from when he first heard the loud "boom" to the time that the en
Probable cause
The failure of the No. 1 linkrod bushing or the bottom portion of the linkrod, which resulted in a total loss of engine power.
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Browse: Alaska · Dehavilland aircraft
Source: NTSB aviation accident database (US government, public domain). Findings may be preliminary or later revised by the NTSB. Not a complete global record.
