On the afternoon of June 21, a representative of the Vietnam Air Traffic Management Corporation (VATM) told VietNamNet reporters that a preliminary report was received from the Southern Air Traffic Management Company regarding the incident involving flights H1575, H1557, and V244 at Division 1 (Ho Chi Minh City Long-range Control Center). The incident triggered a short-term conflict warning (STCA).

"After the system sent out a warning signal, the air traffic controllers issued instructions to adjust the trajectories of the involved flights. At the same time, the crews also performed avoidance maneuvers, ensuring flight safety," said the representative of the VATM.

As soon as the incident occurred, the on-duty crew reported it. The Southern Air Traffic Management Company temporarily suspended the relevant air traffic controllers and began verifying the incident. The incident was also reported to the competent authorities as per regulations.

The VATM representative stated that upon receiving the information, they immediately established an investigation team to verify the cause of the incident. The investigation team is currently performing its duties at the Southern Air Traffic Management Company and will report the findings once the investigation is complete.

The incident occurred at around 6:30 a.m. on June 19. The air traffic controller instructed the H1575 aircraft, en route from Hanoi to Da Lat, to descend to flight level 300 and then to flight level 340, which the aircraft confirmed.

At around 6:31 a.m., aircraft V244, flying from Ho Chi Minh City to Thanh Hoa, established contact with Division 1, reporting that it was maintaining flight level 330. The air traffic controller confirmed the aircraft's identification and requested it to maintain flight level 330, which the aircraft confirmed.

At 6:34 a.m., the air traffic controller cleared H1575 to continue descending to flight level 240, and the aircraft confirmed the instruction again.

However, at around 6:35 a.m., the ATM screen displayed an STCA warning (short-term conflict warning). The air traffic controller immediately instructed H1575 to maintain flight level 340 and turn left to avoid a potential collision.

Simultaneously, the air traffic controller instructed V244 to turn right. Fortunately, at around 6:35 a.m., H1575 confirmed receiving the earlier command to descend to flight level 240. By 6:36 a.m., the ATM screen stopped displaying STCA warnings, indicating that the conflict had been resolved.

N. Huyen