Boeing Chief Executive Dave Calhoun said in a letter on Monday that the planemaker has offered the full support of its technical experts to the investigation led by the Civil Aviation Administration of China.

"We are deeply saddened by the news of the accident involving a China Eastern Airlines 737-800 airplane. The thoughts of all of us at Boeing are with the passengers and crew members on Flight MU 5735, as well as their families and loved ones," Calhoun added.