What happened
On July 6, 2009, an AN-28, registration ST-TYB, departed Al Fashir at 0601 UTC. The flight was operating under VFR with a crew of two and was transporting 1511 kg of food supplies intended for UNAMID forces. The aircraft was flying at an initial flight level of 085, later re-cleared to FL105.
As the aircraft approached the destination of Sarif-Umra, the pilot began a gradual descent at 250 km/h to inspect the runway conditions and wind direction. Upon reaching an altitude of 60 meters during the final approach, the crew observed a dust devil crossing the runway to the right of the aircraft. To avoid this weather phenomenon, the crew initiated a go-around procedure.
During the maneuver, the crew applied full power and began a right turn to gain altitude. However, they experienced a lack of engine response and were impacted by wind shear, causing the aircraft to sink. Despite efforts to maintain control, the altitude decreased rapidly. At 0650 UTC, the aircraft struck the ground and rolled, subsequently hitting a small rock and bouncing. The aircraft finally came to rest on its left main gear and nose, approximately 1,850 meters from the start of runway 05. Both members of the crew survived the accident, though the aircraft suffered substantial damage.
Findings
- The crew encountered a dust devil on the runway during the final approach.
- The aircraft experienced a loss of engine performance and wind shear during the attempted go-around.