What happened
On December 6, 2000, a Cruthley Special, registration ZS-UHH, departed from Margate aerodrome to conduct a test flight within the general flying area. The flight was being conducted by a pilot with a private license and approximately 2,300 total flying hours. During the mission, the aircraft was carrying roughly half a load of fuel.
Approximately 15 minutes into the flight, the aircraft suffered a sudden loss of engine power. In response to the failure, the pilot performed a forced landing on an open beach located south of Port Shepstone, near Oslo Beach. Despite the impact, there were no fatalities and no injuries reported. The aircraft sustained only minor damage, specifically a slightly bent nose wheel.
The investigation
While no formal on-site investigation was performed at the time of the occurrence, a subsequent examination of the engine was conducted. The investigation focused on the 1600CC VW engine used in the aircraft. Meteorological conditions at the time of the accident were reported as fine, with calm winds and a temperature of +30° C.
Findings
Upon dismantling the engine, investigators identified a ring seizure as the primary reason for the power loss. The analysis established that this seizure was the direct result of the engine overheating. Notably, the investigation confirmed that the engine contained a sufficient amount of oil, suggesting the overheating was not due to oil starvation.