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A Singapore Airlines Airbus experienced a rapid descent after two of its engines failed. Photo: Danny Lee

Probe after Singapore Airlines flight loses power in both engines at 39,000 feet over Hong Kong

After a Singapore Airlines plane carrying 194 people lost power in both engines outside Hong Kong on Saturday, plummeting almost four kilometres before pilots regained control.

After a Singapore Airlines plane carrying 194 people lost power in both engines outside Hong Kong on Saturday, plummeting almost four kilometres before pilots regained control, the airline said it was still working to determine the cause of the incident.

The drama on the Shanghai-bound Airbus A330 unfolded some 3½ hours after its 5.35pm departure from Singapore when, over a period of 30 minutes, the plane descended from about 11,900 metres as the first engine failed, followed by the second. Pilots managed to regain full control of the plane at 7,900 metres as both Rolls Royce engines regained power.

The airline said it had begun a joint investigation with Airbus and its engine supplier Rolls Royce into what caused flight SQ836 to lose power.

Singapore Airlines confirmed the incident on Tuesday evening, revealing that the pilots put the plane into a deliberate descent in order to regain power in one of the failed engines.

The Aviation Herald, an online clearing house for airborne incident reports, first reported the engine failure on Tuesday morning.

"Both engines experienced a temporary loss of power, although one engine returned to normal operations almost immediately," the airline said in a statement. "The pilots followed operational procedures to restore normal operation of the second engine by putting the aircraft into a controlled descent."

The plane landed in Shanghai at 10.56pm, where "the engines were thoroughly inspected and tested … with no anomalies detected", the airline said.

SEE ALSO: Pilots thwart disaster as engines fail on approach to Chek Lap Kok

According to the Planespotters.net flight database, Airbus delivered the plane on March 30. It had not flown elsewhere since returning from Shanghai, but had not been taken out of service, the airline said.

Singapore's air safety regulator said it was still gathering information and flight data from the airline.

Airbus said it was in contact with Singapore Airlines and Rolls Royce as they sought to determine the cause of the incident. Rolls Royce said it was working with the airline "to provide support and technical assistance".

Weather factors, mechanical and technical issues will be investigated.

Weather radar charts show the plane was heading into a powerful storm at the time of the incident - the same one that had caused chaos at Chek Lap Kok airport throughout the weekend.

The Hong Kong Observatory said an aviation weather alert was issued on Saturday around the area where the plane's engines failed. Scientific officer Ping Cheung said the storm reached an altitude of 11,600 metres at its height.

In 2010, a Cathay Pacific A330 plane made an emergency landing at Chek Lap Kok after contaminated fuel rendered both engines useless, with one losing power completely.

This article appeared in the South China Morning Post print edition as: Singapore Airlines jet plunges 4km after engines fail
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