What happened
On July 31, 2020, a Tecnam P2006T aircraft, registration SP-SPO, was conducting a flight test for Instrument Rating (IR(A)) certification. The flight originated from EPBC with a planned route of EPBC – EPSY – EPBC.
During the approach to landing at Szymany (EPSY), the pilot observed that the oil temperature on the left engine had exceeded the maximum allowable limit. In response to this indication, the examiner decided to shut down the left engine. The crew notified the Szymany Tower of the intention to land on a single engine. The landing was completed successfully without further incident.
The investigation
Following the event, technical personnel performed an inspection of the aircraft. The investigation focused on the cause of the high temperature reading. During the inspection, technicians discovered that the contacts of the oil temperature sensor connector were contaminated.
Findings
- The primary cause of the event was contamination of the oil temperature sensor connector contacts.
After cleaning the contacts and securing the electrical wiring, a ground engine run was performed. The engine parameters were found to be within normal operating limits, and the aircraft was subsequently cleared for flight.