Incident Overview
On 13 June 2003 at 0800Z, a Jabiru J400, registration ZU-ZAN, departed from Grand Central Aerodrome (FAGC) on a training flight to the Pretoria GF1 area. The aircraft carried two persons on board: a pilot and a student pilot. Weather conditions were fine, with calm surface winds and a temperature of 20°C.
Flight Sequence
In the training area, a series of incipient spins were performed, followed by a stall. Immediately after the stall recovery was executed, the engine began running rough. In response, the pilot decided to carry out a precautionary landing on a disused airfield in the Kameeldrift area, located at coordinates S 25°46' E028°04'.
Outcome
Both occupants escaped unharmed, and the aircraft did not sustain any damage. The incident resulted in no injuries and no fatalities.
Investigation Findings
The probable cause was determined to be a dislodged exhaust valve seat on the number 2 cylinder, which caused the engine to lose significant power.