A Safarilink Dash 8 (5Y-SLK) and a 99 Flying Club Cessna 172M Skyhawk experienced a mid-air collision near Wilson Airport (WIL/HKNW) on a training flight. The Cessna crashed in Nairobi National Park, resulting in the deaths of both occupants. The Dash 8 safely returned to Wilson Airport, with all 39 passengers and five crew unharmed. The aircraft sustained damage to the leading edge of its right-hand horizontal stabilizer. The Cessna operated on a training flight, performing touch-and-goes on runway 07, and was instructed to look out for traffic upwind runway 07. The crew reported visual traffic to their 8 o?clock position, and upwind traffic was advised to look for the DHC-8 departing runway 14. The captain experienced visual traffic to his 8 o?clock position, which he described as being well clear of conflict at approximately 400ft. Around 6,000ft, the crew heard a loud bang and felt an impact, leading to the PIC feeling an imbalance (a yaw) and attempting to recover stability. The PIC stopped climbing and leveled off at 6,200ft. The flight then returned to WIL after a possible collision with another aircraft, occurring on the Cessna’s early downwind leg.A Safarilink Dash 8 (5Y-SLK) and a 99 Flying Club Cessna 172M Skyhawk experienced a mid-air collision near Wilson Airport (WIL/HKNW) on a training flight. The Cessna crashed in Nairobi National Park, resulting in the deaths of both occupants. The Dash 8 safely returned to Wilson Airport, with all 39 passengers and five crew unharmed. The aircraft sustained damage to the leading edge of its right-hand horizontal stabilizer. The Cessna operated on a training flight, performing touch-and-goes on runway 07, and was instructed to look out for traffic upwind runway 07. The crew reported visual traffic to their 8 o?clock position, and upwind traffic was advised to look for the DHC-8 departing runway 14. The captain experienced visual traffic to his 8 o?clock position, which he described as being well clear of conflict at approximately 400ft. Around 6,000ft, the crew heard a loud bang and felt an impact, leading to the PIC feeling an imbalance (a yaw) and attempting to recover stability. The PIC stopped climbing and leveled off at 6,200ft. The flight then returned to WIL after a possible collision with another aircraft, occurring on the Cessna’s early downwind leg.