Incident Overview
On 7 February 2020, a Tecnam P2006T (registration SP-FPL) was prepared for a photogrammetric flight. During the pre-flight inspection, the pilot measured the engine oil level, finding approximately 2.5 liters, corresponding to the midpoint of the dipstick scale. An engine run-up was performed and showed no abnormalities. The aircraft departed at 16:58 UTC.
In-Flight Anomalies
After takeoff, while climbing through approximately 1100-1200 feet, the pilot noticed vibrations from the left engine. Cockpit instruments at that moment did not indicate any irregularities. The vibrations subsided after a short period, and the pilot elected to continue the flight. Several minutes later, the pilot observed an increase in left engine oil pressure and propeller rpm. In response, the pilot decided to terminate the flight and return to the departure airport.
Landing and Inspection
The aircraft landed safely at 17:09 UTC. Post-flight examination revealed oil streaks on the underside of the left engine nacelle. Checking the oil level disclosed a substantial loss, with the dipstick showing no reading. Additionally, one cylinder of the left engine lacked compression.
Cause
The investigating authority determined that the incident resulted from a loss of tightness of one cylinder of the left engine. No contributing factors were identified, and no safety recommendations were issued.