The world’s largest pilot union rebuked the federal agency handling the investigation of Saturday’s passenger jet crash in San Francisco, United States of America, saying it had released too much information too quickly.
“This could lead to wrong conclusions and compromise safety,” the union said.
Releasing data from the flight’s black boxes without full investigative information for context “encourages wild speculation” about the cause of the crash, the Air Line Pilots Association International said in a statement late on Monday.
The criticism came after the National Transportation Safety Board gave a detailed account of the flight’s final minutes in a regular daily update on the crash.
The NTSB is the lead investigator of Asiana Airlines flight 214, a Boeing 777 that broke apart and burnt after crash-landing short of the runway.
Two teenage Chinese passengers were killed and more than 180 other people were injured in the first fatal accident involving a 777 since the plane was introduced in 1995.
Answering ALPA’s criticism, NTSB spokeswoman, Kelly Nantel, said the agency routinely provided factual updates during investigations.
“For the public to have confidence in the investigative process, transparency and accuracy are critical,” Nantel said.
NTSB Chairman, Deborah Hersman, told reporters on Monday that the plane was significantly below its target landing speed for more than half a minute before impact.
That information expanded on data Hersman released on Sunday that indicated the plane was below speed during the final seven seconds.
Hersman said the plane was traveling at 134 knots, or nautical miles per hour, 34 seconds before impact, well below the target landing speed of 137 knots.
The plane continued to slow down and when it hit the ground, the speed was 106 knots, she said.
Hersman cautioned on Monday that the NTSB and other agencies were still interviewing the four pilots from the flight, and she said it was premature to draw conclusions.
She also said the flight data recorder would be cross-checked with air traffic control logs, radar and the cockpit voice recorder.
ALPA, the Washington, DC-based union that represents more than 50,000 pilots in the US and Canada, said the NTSB statements gave the impression that the agency had “already determined probable cause.”
Asiana Airlines, based in South Korea, has said the pilot at the controls, Lee Kang-kuk, was still training on Boeing 777 jets and his supervisor was making his first flight as a trainer.
Lee had 43 hours of experience flying the long-range jet, the airline said.
On Tuesday, Hersman said in a television interview that the agency wanted to understand the pilot’s experience and would release more details at a briefing later in the day.
Aviation experts said the low speeds during the plane’s final approach suggested that the pilots probably had time to realize the plane was stalling and to react.
Passengers also have reported that the plane was rolling from side to side during the approach, which in calm winds is another indication of stalling, said Hans Weber, president of TECOP International Inc and an aerospace consultant, who has been an adviser to the FAA.
As soon as a plane goes below the minimum speed for a landing, there should be a vibration in the controls meant to warn pilots of a stall, he said.
“If they had commanded full throttle at that point,” Weber said, “there’s a good chance they would have made it.”
Reuters/NAN.
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