WHEELING, IL, USA
N6995Y
PIPER 23-250
SHORTLY AFTER TAKEOFF THE PILOT NOTICED A LOSS OF OIL PRESSURE ON BOTH ENGINES AND INITIATED A LEFT TURN BACK TO THE AIRPORT. DURING LANDING THE AIRCRAFT DEPARTED THE RIGHT SIDE OF RUNWAY 12, COLLIDED WITH, AND SUBSTANTIALLY DAMAGED TWO CESSNA 150'S AND DESTROYED A PIPER PA-32. BOTH ENGINES HAD 9X5 INCH HOLES ON THE TOP OF THE CRANKCASES AND BOTH HAD TWO CONNECTING RODS THAT HAD SEPARATED. THE ENGINE LOGBOOKS REVEALED THAT THE OIL HAD BEEN CHANGED ON 10/16/81 WITH THE EQUIVALENT OF SAE 40 OIL. THE LYCOMING OPERATOR'S MANUAL, WHICH WAS WITH THE AIRCRAFT RECORDS, RECOMMENDS THAT SAE 20 OIL BE USED FOR OPERATION AT TEMPERATURES BELOW 10 DEGREES F. THE TEMPERATURE AT THE TIME OF THE ACCIDENT WAS -15 DEGREES F.
Source: NTSB Aviation Accident Database
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