Accident Overview
While descending to Moshabong Lake and completing a last turn, the pilot lost control of the airplane. The aircraft stalled and crashed into the lake near the shore. Two passengers were killed in the accident; the pilot and a third passenger sustained serious injuries.
Aircraft and Load
The investigation determined that the takeoff was made with the aircraft slightly overloaded. Additionally, a non-approved type wide transom aluminium boat was strapped externally to the aircraft.
Loss of Control
On final approach to Moshabong Lake, control was lost due to strong gusty wind. The combination of the overloaded condition, external load, and wind resulted in a stall and subsequent crash.
Injuries and Damage
The crash resulted in fatal injuries to two passengers. The pilot and one other passenger were seriously injured. The aircraft was destroyed by impact with the lake.
Investigation Findings
The official probable cause of the accident was the aircraft being slightly overloaded and carrying a non-approved external boat during takeoff, and the loss of control on final approach due to strong gusty wind.