Vietjet engineers have finished updating the software. (Photo: VGP)

According to the Civil Aviation Authority of Vietnam (CAAV), Vietnam Airlines and Vietjet’s operations have returned to normal, with no further disruptions caused by the emergency software directive. On Sunday, Vietnam Airlines finished updating its entire A320/A321 fleet earlier than required, and Vietjet completed upgrades for 69 aircraft four hours before the deadline. Early compliance by Vietnamese carriers minimized the impact on flight schedules.

On Friday, immediately after receiving a directive from Airbus and EASA, CAAV identified 81 of 169 A320/A321 aircraft at Vietnam Airlines and Vietjet that required the update. Vietnam Airlines promptly activated update procedures at Noi Bai airport in Hanoi, Da Nang airport, and Tan Son Nhat airport in Ho Chi Minh City. The update was carried out overnight with full technical support from Airbus. Vietnam Airlines said close coordination among engineering, operations, and flight control teams enabled it to finish ahead of schedule and minimize disruptions. All flights on Saturday and Sunday operated normally and met CAAV safety standards.

Meanwhile, Vietjet’s technical teams completed the upgrade at about 3 a.m on Sunday. They had to perform system checks, software calibration, test runs, and data verification within a tight timeframe to ensure that aircraft could return to service the same day.

Friday's alert followed an unintended loss of altitude on an October 30 JetBlue flight from Cancun, Mexico, to Newark, New Jersey, which injured 10 passengers, according to France's BEA accident agency, which is probing the incident. There were also unresolved questions about the impact of solar flare radiation blamed for the JetBlue incident, which is being treated by French investigators as an "incident," the lowest of three categories of potential safety emergency.