Flight Events
The pilot-in-command reported that during the flight, the fuel flow began to fluctuate and the engine subsequently ran rough. In response, the pilot switched fuel tanks, after which the engine operation smoothed out. Later, the pilot switched back to the original fuel tank. Upon returning to the original tank, the engine oil pressure dropped to zero and the engine began to vibrate.
Pilot Actions
Faced with the loss of oil pressure and engine vibration, the pilot decided to shut down the engine and execute a forced landing. No further details about the landing or any outcomes were provided.
Post-Flight Examination
Following the incident, an examination of the engine was conducted. The inspection revealed that the engine oil pump was functional and that there was a sufficient quantity of oil in the engine. However, the examination also found water contamination in the fuel injector distributor.