Investigation into near-collision between two aircraft.

The Vietnam Civil Aviation Authority has temporarily suspended the duty crew and is coordinating with relevant units to clarify the incident involving the potential collision between two aircraft on June 24th.

On the afternoon of July 5th, a representative from the Vietnam Civil Aviation Authority stated that the agency had requested the Vietnam Air Traffic Management Corporation to temporarily remove all personnel on duty at the Noi Bai air traffic control tower from the air traffic control system due to an operational incident.

Earlier, on June 24th, Thai AirAsia flight AIQ645 taxied to the end of runway 11R awaiting takeoff from Hanoi to Bangkok (Thailand). At this time, flight VJC943 also received instructions to land on runway 11L (parallel to 11R).

After the air traffic control shift supervisor issued instructions for AIQ645 to stop and wait for takeoff, the air traffic controller changed the flight operation plan, issuing instructions for aircraft VJC943 to cross runway 11R via taxiway S8; then issued instructions for aircraft VJC436 to land on runway 11L.

However, because the AIQ645 crew did not repeat the hold on departure instructions, having already received and agreed on the takeoff instructions, AIQ645 proceeded with takeoff.

Neither the air traffic controller nor the shift supervisor detected aircraft AIQ645 from the time it began its takeoff until it was near the intersection of runway CHC 11R and taxiway S4, so no action was taken to handle the situation.

The plane takes off from Noi Bai Airport. Photo: Giang Huy — The plane takes off from Noi Bai Airport. Photo: *Giang Huy*

According to the AIQ645 flight crew report, the moment the aircraft lifted its nose wheel and left the ground was approximately past the intersection of runway 11R and taxiway S5. At this time, VJC943 was at the intersection of runway 11R and taxiway S8. The distance between AIQ645 and VJC943 when it left the ground was approximately 1,500 m.

The Vietnam Civil Aviation Authority is coordinating with relevant parties to clarify the extent of the incident and measures to prevent its recurrence. The Vietnam Air Traffic Management Corporation has been requested to organize a debriefing session to learn from the incident for all air traffic controllers and the Approach Control Center at Noi Bai Airport.

Gia Chinh

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