Challenger 604 loses door after Abuja take-off, nine people safe

A door separated from a Bombardier Challenger 604 shortly after take-off from Abuja, Nigeria, on 15 October 2026. All nine people aboard returned safely to the airport. Nigeria’s Safety Investigation Bureau (NSIB) has recovered the door and launched an investigation into why it detached in flight.

The business jet, registered T7-SEI and operated by Triton Aviation as flight DWC052, was heading to Lagos. According to the NSIB statement issued on 16 October, it departed Abuja at 16:12 UTC. Approximately three nautical miles from the airport, while climbing through 3,500 feet, the crew declared Mayday following the separation of a door. The aircraft returned to land on Runway 22 at 16:34 UTC, 22 minutes after departure.

The bureau confirmed that six passengers and three crew members were on board. All nine were safe and no injuries were reported. Fire, rescue and medical teams had been placed on standby ahead of the landing, according to Nigerian reports.

Door recovered as investigators examine what happened

NSIB director-general Alex Badeh Jr. said the detached door had been recovered and secured at the bureau’s investigation facilities. Its recovery confirms that it separated from the aircraft but does not establish the underlying cause. Investigators have not announced findings attributing the occurrence to a mechanical defect, maintenance work or crew action.

An operational account reported by ThisDay says air traffic controllers attempted to assess the aircraft with binoculars but could not determine the door’s condition from their position. The missing door became apparent after landing. Those details help explain the emergency response without resolving the engineering question.

Some early accounts placed take-off at 16:17 UTC. The departure and landing times used here, 16:12 and 16:34 UTC, are the figures attributed to the NSIB statement by The Punch and Voice of Nigeria.

What a door separation can mean for a business jet

An unsecured or detached aircraft door can disturb airflow and cause severe noise. Depending on the type of door and stage of flight, it may also raise pressurisation concerns. These are potential hazards, not confirmed findings about damage to this particular Challenger. The NSIB has not published a detailed technical damage assessment.

A Mayday call requests priority assistance during a distress situation; it is not evidence that the pilots lost control. In this case, the crew returned the aircraft safely to Abuja.

Investigators will need to examine the recovered door and its locking mechanism, pre-flight checks and relevant maintenance records. Their findings should establish whether the separation resulted from a one-off failure or reveals a problem requiring further action on other aircraft.