The Aviation Safety Council yesterday revealed preliminary information from the flight data recorder (FDR) and cockpit voice recorder of the crashed TransAsia Airways Flight GE235, showing that the pilots may have mistakenly turned off the engine that could have kept it airborne.
Council executive director Thomas Wang (王興中) said that the master warning for the No. 2 engine was triggered about 37 seconds after takeoff, which indicated that the engine had flamed out. During that time, the airplane was flying at an altitude of 457m, he said.
Wang also said that the propellers of the No. 2 engine went into the feathered mode after the flame-out signal. The auto-feather system is activated when the power of the engine becomes insufficient to produce the thrust, he said, adding that the system helps reduce drag during an engine failure.
Photo: EPA
“Even though the flame-out alarm went off, the engine did not actually flame out and was still running,” Wang said, adding that the aircraft’s dashboard should have informed the pilot that it was the No. 2 engine that had malfunctioned.
Despite the problem with the No. 2 engine, Wang said that the flight crew did not shut it down, but decided to increase its throttle.
Wang said that although there was no sign of abnormality with the No. 1 engine, the flight crew manually turned it off when the airplane climbed to 488m, leading that engine to go into feathered mode as well.
Photo: Liao Chen-hui, Taipei Times
The flight crew later tried to restart the No. 1 engine, but did not have enough time to power the engine back into full operation, Wang said.
The data further showed that the aircraft had sounded a stall warning five times before the FDR stopped recording.
After the third stall warning, the flight crew contacted the control tower and called out: “Mayday, Mayday, engine flame-out.”
The council also showed the data plot from the FDR of the engines, which indicated that both engines had operated normally before the No. 2 engine went into feathered mode.
As to what led to the failure of the No. 2 engine and why the flight crew decided to turn off the No. 1 engine following a brief discussion, Wang said that these questions could only be answered after further investigation.
Previously, media reports had speculated that the problem could be with the No. 1 engine, as the company had replaced it twice since it acquired the aircraft from the French manufacturer.
Yann Torres, a representative from the French Bureau of Enquiry and Analysis for Civil Aviation, also attended the press conference and confirmed that the ATR 72-600 airplanes are able to operate with one engine, even during take-off.
Meanwhile, the Civil Aeronautics Administration (CAA) said that all pilots operating ATR 72 models are to be retrained.
Clark Lin (林俊良), director of the administration’s flight standards division, said that the airline has 71 pilots trained to fly ATR 72 planes, adding that they would be required to take an oral test on operating the aircraft.
The test would be administered over four days, beginning today, he said.
Lin said that pilots could still fly the airplanes before they take the test, because they are qualified pilots.
However, they must finish the test within four days and would be asked to be requalified as pilots if they fail the test, Lin said.
The pilots would later be asked to operate a flight simulator as well.
CAA statistics showed that of five TransAsia Airways incidents between 2010 and last year that involved problems with an engine, two of them were attributed to human error.
‘NO SECURITY RISK’: The Railway Bureau reassured the public that the technicians’ activities were limited to technical guidance and did not involve sensitive systems The Railway Bureau yesterday said it had invited eight Chinese technicians to assist with an airport MRT construction project. The bureau issued the confirmation after an Internet user said Chinese nationals had entered the construction zone of Taiwan Taoyuan International Airport’s Terminal 3 project. They asked why “individuals from an enemy state” were allowed access to such a major national infrastructure project, which raised serious concerns over Taiwan’s industrial safety, sensitive systems and information security. The bureau’s Northern Region Engineering Branch Office said subcontractor Taiwan Handle Industrial Co (台灣手把工業) of the Taoyuan airport MRT’s “Contract No. CU05 Project A14 Station Civil, MEP &
The National Chungshan Institute of Science and Technology yesterday showcased its locally developed variants of the Vision 60 robotic patrol dog, which it plans to deploy on the nation’s outlying territories in the South China Sea. The variants were produced under the Joint Lab project — created by the institute and domestic companies — and assembled with domestically produced motors, lenses and artificial intelligence (AI) systems alongside licensed tech from the US, Missile and Rocket Systems Research Division deputy director Jen Kuo-kang (任國光) told the media event at a military base in Taipei’s Dazhi (大直) area. Taiwan has built up its strengths
NOT IMMEDIATE: Taiwan has a chance to appeal the proposed 10 percent tariff before it starts, while other countries face a 12.5 percent tariff from the trade office Taiwan is among 60 economies determined by the US to have failed to impose or enforce a ban on the importation of goods produced with forced labor, according to a notice released on Tuesday by the Office of the US Trade Representative (USTR), which proposed imposing an additional 10 percent or more tariff on them. The USTR in a statement said that following an investigation, it had determined under Section 301 of the Trade Act of 1974 that the failure of the 60 economies to impose and effectively enforce a prohibition on the importation of goods produced with forced labor is
RIGHT DIRECTION: Taiwan’s efforts to prevent forced labor include a proposal to ‘fully prohibit’ employers from withholding workers’ documents, an official said Taiwan is to establish a mechanism to restrict imports of goods linked to forced labor, the Executive Yuan said yesterday, after the US proposed imposing additional tariffs on Taiwanese goods over labor concerns. “The Ministry of Labor and the Ministry of Economic Affairs are to establish an interministerial review procedure,” Executive Yuan spokesperson Michelle Lee (李慧芝) said at a news briefing in Taipei. “The government is to use the Foreign Trade Act [貿易法] as the legal basis to restrict imports of goods produced with forced labor” and bring its supply chain governance more in line with international standards on human rights, resilience
RSS