China News Service, June 10, in the early hours of June 10, HNA announced that on June 9, flight HU7380 (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.
A separate flight has been arranged to continue the flight. Passengers arrived in Beijing at 23:41 on the same day. 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. It acts as a double-supporting load-bearing structure. The outer layer cracks will not directly affect flight safety.