Plane crashes in Alaska outpace national norms<\/a>]<\/ins><\/p>\nMountain Air’s single-engine de Havilland DHC-2 MK 1 Beaver and Taquan’s larger turboprop de Havilland DHC-3 Otter collided just after noon over the west side of George Inlet.<\/p>\n
Aircraft rely on “see and avoid” by pilots to prevent midair crashes, the staff said. But the crash occurred on a clear day in the afternoon.<\/p>\n
Vice Chairman Bruce Landsberg said the “see and avoid” system doesn’t work well in high traffic areas where the sight-seeing planes were traveling.<\/p>\n
Chairman Robert Sumwalt read a statement of probable cause, which has not yet been approved by the board. He said the pilots didn’t see each other in time to avoid a collision. Contributing factors included “preoccupation with matters unrelated to duties such as attempting to provide passengers with a scenic view and physiological limits on the human vision, reducing the time opportunity to see-and-avoid other aircraft,” he said.<\/p>\n
Staff members told the board the Otter pilot recalled seeing a white and red flash, then a tremendous collision.<\/p>\n
The Beaver pilot’s view would have been obstructed by the airplane’s structure and a passenger seated to his right during the critical moments before the crash. The Otter pilot’s view was obscured by a window post, the staff said.<\/p>\n
William Bramble, the NTSB’s human performance specialist, told the board that both planes were equipped with systems that track other planes, but visual and audible alerts weren’t working in either plane due to malfunctions.<\/p>\n
“The Otter pilot seemed to miss seeing the target (the other plane) on the display because he last recalled looking at the display about four minutes before the collision,” Bramble said.<\/p>\n
Documents released earlier by the NTSB show the propeller of the Taquan Otter hit the other aircraft, leaving deep cuts later documented by investigators. The tail of the Mountain Air plane hit the left side of the Taquan aircraft, popping open a door.<\/p>\n
The leg of a passenger sitting near the door was sucked outside the plane as other passengers held him in place, witnesses said.<\/p>\n
Otter Pilot Lou Beck estimated his plane took five seconds to hit the water 10 miles northeast of Ketchikan.<\/p>\n
At least three people could be heard saying, “brace brace brace,” on a camera recording audio before the Taquan plane hit the water.<\/p>\n
The Mountain Air Beaver plane broke up in flight, scattering debris across 3,000 feet.<\/p>\n
Mountain Air Service closed after the accident.<\/p>\n","protected":false},"excerpt":{"rendered":"
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