On June 5, 2020, an Allied Air flight AJK206, a Boeing 737-400 (SF), deviated from its planned flight path and landed off runway 22 at Abuja International Airport (ABV), Nigeria. The flight, involving two crew members and four passengers, was scheduled for positioning flights to pick up cargo for the Central Bank of Nigeria (CBN). At 09:11, the aircraft departed Lagos for Abuja, with a flight crew of two pilots, two engineers, and two CBN personnel. The flight was uneven, and the flight crew established contact with Abuja Tower. Tower instructed AJK206 to continue the approach, advising a preceding aircraft was on short finals and another aircraft was lining up for departure. The flight crew then requested priority to land behind the preceding traffic, ahead of traffic cleared to line up and wait. At 10:03, the Flight Officer requested clearance to land after the landing traffic, and Abuja Tower instructed AJK206 to continue the approach and clear it to land on runway 22. The Flight Officer reported Flap 30 could not be deployed, and the Captain acknowledged this. They elected to continue with Flap 15 until landing as the aircraft’s weight was within limits. At 10:04:24, the Flight Officer called out ‘three nautical miles,’ prompting AJK206 to request landing clearance. Abuja Tower instructed AJK206 to continue the approach and clear it to land on runway 22. The Flight Officer reported Flap 15 could not be deployed, and the Captain acknowledged this. The flight crew then reported a thump and a landing gear horn. The Flight Crew’s post-occurrence statement indicated the touchdown was smooth and speed brakes and reversers were deployed automatically. Shortly after, a bang was heard from the aircraft’s right side, and then the aircraft collapsed to its right while the Flight Crew attempted to maintain directional control. The aircraft proceeded the landing roll as its number 1 engine nacelle dragged on the runway for 1172 m before veering off to the right of the runway centerline. The aircraft came to a final stop in the grass verge and made a 170ø turn to the right. The flight crew then shut down the engines and secured the aircraft. All the occupants exited the aircraft through the forward main door without injuries. The incident was investigated and determined to be a result of a sudden, unexpected shift in the aircraft’s trajectory due to a combination of factors including a miscalculation of the runway’s centerline and a sudden change in the anticipated traffic pattern.On June 5, 2020, an Allied Air flight AJK206, a Boeing 737-400 (SF), deviated from its planned flight path and landed off runway 22 at Abuja International Airport (ABV), Nigeria. The flight, involving two crew members and four passengers, was scheduled for positioning flights to pick up cargo for the Central Bank of Nigeria (CBN). At 09:11, the aircraft departed Lagos for Abuja, with a flight crew of two pilots, two engineers, and two CBN personnel. The flight was uneven, and the flight crew established contact with Abuja Tower. Tower instructed AJK206 to continue the approach, advising a preceding aircraft was on short finals and another aircraft was lining up for departure. The flight crew then requested priority to land behind the preceding traffic, ahead of traffic cleared to line up and wait. At 10:03, the Flight Officer requested clearance to land after the landing traffic, and Abuja Tower instructed AJK206 to continue the approach and clear it to land on runway 22. The Flight Officer reported Flap 30 could not be deployed, and the Captain acknowledged this. They elected to continue with Flap 15 until landing as the aircraft’s weight was within limits. At 10:04:24, the Flight Officer called out ‘three nautical miles,’ prompting AJK206 to request landing clearance. Abuja Tower instructed AJK206 to continue the approach and clear it to land on runway 22. The Flight Officer reported Flap 15 could not be deployed, and the Captain acknowledged this. The flight crew then reported a thump and a landing gear horn. The Flight Crew’s post-occurrence statement indicated the touchdown was smooth and speed brakes and reversers were deployed automatically. Shortly after, a bang was heard from the aircraft’s right side, and then the aircraft collapsed to its right while the Flight Crew attempted to maintain directional control. The aircraft proceeded the landing roll as its number 1 engine nacelle dragged on the runway for 1172 m before veering off to the right of the runway centerline. The aircraft came to a final stop in the grass verge and made a 170ø turn to the right. The flight crew then shut down the engines and secured the aircraft. All the occupants exited the aircraft through the forward main door without injuries. The incident was investigated and determined to be a result of a sudden, unexpected shift in the aircraft’s trajectory due to a combination of factors including a miscalculation of the runway’s centerline and a sudden change in the anticipated traffic pattern.