On June 9, our HU7380 flight (models B737-800 B-5579 Sanya-Beijing) returned due to mechanical failure. After preliminary investigation, after the aircraft took off, the outer windshield cracked after using the right No. 1 windshield for heating. In order to ensure flight safety, it was decided to return to Sanya. The cause of the failure is under further investigation. Our company has arranged another plane to continue the flight. Passengers arrived in Beijing at 23:41 that day. Our company apologizes for any inconvenience caused to passengers.
The B737 windshield is composed of three layers, the outer layer is a non-structural layer, the middle layer and the inner layer are structural layers, which is the main load-bearing structure and provides double-supported load-bearing capacity. Effect, the outer cracks will not directly affect flight safety.