Cockpit recording indicates de-icing problems in Brazil plane crash

7 September 2024, 02:14

The debris at the site where an airplane crashed
The debris at the site where an airplane crashed. Picture: PA

All 62 people on board were killed in the crash close to Sao Paulo last month.

The pilots of a Brazilian passenger plane which crashed last month, killing all 62 people aboard, reported a failure in the system to remove ice from the plane, according to a preliminary report.

Investigators in Brazil were careful to avoid saying this was the cause of the accident and the report, made public on Friday, stressed there was more work to be done but gave further credence to aviation experts’ main hypothesis that the lift loss had been caused by ice formation on the plane’s wings and failure of its de-icing system.

Weather reports from the day of the accident predicted ice formation in the region where the plane went down.

Audio from the cockpit’s voice recorder included comments from pilots indicating ice was accumulating and there was a failure in the de-icing system, Paulo Froes, an investigator in the air force’s centre for the investigation and prevention of air accidents, told reporters in Brasilia.

Just two minutes before the crash, the co-pilot said: “A lot of ice.”

The plane’s data recorder also indicated that its de-icing system, responsible for preventing ice build-up on wings, turned on and off several times, according to their report.

“There are still many doubts. This accident shouldn’t have happened, not in the conditions in which the plane was flying and was being operated. It had protection equipment,” said Carlos Henrique Baldin, head of the centre’s investigation division.

Operated by the airline Voepass, the flight left the city of Cascavel, in Parana state, on August 9 bound for Sao Paulo’s Guarulhos international airport. It crashed into the backyard of a home in a gated community in the city of Vinhedo, about 50 miles north west of the metropolis of Sao Paulo.

Footage of the ATR 72 twin-engine turboprop plunging in a flat spin horrified people across Brazil.

“Based on the preliminary report, it isn’t possible to conclusively affirm that ice on the wings caused the accident, but there are indications ice formation was a significant contributing factor,” Henrique Hacklaender, the president of the national aviators’ union, told The Associated Press after the press conference.

He said the ATR 72’s de-icing system is manually controlled by pilots and the preliminary report reveals it was activated during the flight, indicating an attempt to use it.

The report does not clarify if the system was actually employed, he added.

The air force’s centre, known as Cenipa, is continuing its investigation into the cause of the accident with no set deadline for conclusions. They are also collaborating with an ongoing Federal Police inquiry to determine if anyone is liable for the crash.

ATR is a French-Italian company and its model 72 is generally used on shorter flights. The planes are built by a joint venture of Airbus in France and Italy’s Leonardo S.p.A.

Crashes involving various models of the ATR 72 have resulted in 470 deaths going back to the 1990s, according to a database of the Aviation Safety Network.

It was the deadliest airline crash since January 2023, when 72 people died on board a Yeti Airlines plane in Nepal that stalled and crashed while making its landing approach. That plane also was an ATR 72 and the final report blamed pilot error.

By Press Association

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