Incident Overview
An aircraft performed a precautionary landing on a highway after both engines experienced a loss of oil pressure. The pilot executed the landing in response to the abnormal engine readings. Post-accident investigation revealed that the cause of the oil pressure indications was not due to engine mechanical faults.
Pilot Actions
Upon detecting the loss of oil pressure in both engines, the pilot decided to feather the right propeller. This action was taken because the right engine exhibited abnormal indications before the left engine. At the time of touchdown, the left engine was still operating.
Post-Accident Investigation
Following the landing, a thorough investigation of both engines was conducted. No discrepancies were found in either engine, with the sole exception of an inoperative oil pressure gauge. Furthermore, because the propeller operated through its full range, investigators determined that there was oil pressure present in the engine during the event. No other mechanical issues were identified.