Last Updated May 27, 2015 3:43 PM EDT
SINGAPORE -- Singapore Airlines said Wednesday that it is investigating how one of its jets suffered a loss of power in both of its engines over the weekend and descended 13,000 feet before regaining altitude en route from Singapore to Shanghai.
The Airbus A330-300 was carrying 182 passengers and 12 crew members when the incident occurred Saturday, the airline said in a statement. The jet lost power in both engines after hitting bad weather 3 1/2 hours into the flight, but one engine quickly resumed normal operations, it said.
"The pilots followed operational procedures to restore normal operation of the second engine by putting the aircraft into a controlled descent, before climbing again," the statement said.
Data from FlightRadar24.com and a report in the Aviation Herald showed the plane was cruising at 39,000 feet about 162 miles from Hong Kong when the Rolls-Royce Trent 772 engines stopped working.
The jet dropped to 26,000 feet before power was restored, and climbed back to 31,200 feet before it landed safely in Shanghai about 1 hour and 40 minutes later, the report said.
Singapore Airlines said no "anomalies" were detected in either of the engines after the plane arrived in Shanghai, and that it is reviewing the incident with Rolls-Royce and Airbus.
The plane later took off to return to Singapore after a two-hour delay, Aviation Herald reported.