What happened
On 10 October 2014, a DH-82A (registration ZS-OOR) departed from Springs Aerodrome (FASI) to perform a test flight following the installation of a new engine. While the aircraft was established on a right downwind leg for runway 03, at an altitude of approximately 800 feet AMSL, the engine failed.
The pilot immediately transitioned the aircraft into a forced landing procedure, targeting runway 03. The aircraft touched down on the runway without any damage to the airframe. The pilot evacuated the aircraft safely and sustained no injuries.
The investigation
An investigation into the incident focused on the mechanical state of the newly installed engine. Following the event, the aircraft was moved to a maintenance facility where a teardown inspection of the engine was conducted.
Engineers confirmed that the oil levels had been sufficient for standard operation and that no abnormalities were noted during previous ground runs. However, the physical examination of the engine components revealed internal mechanical failure.
Findings
- The pilot was properly licensed for the operation.
- The engine failure occurred during a flight intended to verify the installation of a new engine.
- The primary cause of the engine failure was the seizure of the number 1 and 2 pistons.
- The specific underlying reason for the piston seizure could not be determined by the maintenance engineer.