By: www.aeroinside.com

A China Eastern Airbus A330-300, registration B-6125 performing flight MU-721 from Shanghai Hongqiao to Hong Kong (China), was climbing out of Shanghai when passengers detected a burning odour and developing haze in the cabin prompting the crew to stop the climb at 5500 meters (FL181) and return to Shanghai Hongqiao for a safe landing about 45 minutes after departure. A replacement Airbus A330-300 registration B-6119 reached Hong Kong with a delay of 4.5 hours delay. The airline reported a technical fault prompted the return to Shanghai.