What was found
FLT 254 - PBI-BWI - AT FL 330, MASTER CAUTION LIGHT CAME ON, LOW OIL PRESSURE LIGHT CAME ON, NOTICED LOSS OF ALL OIL QUANTITY, LOW OIL PRESSURE, AND RISING OIL TEMPERATURE. SHUT DOWN NR 1 ENGINE, DIVERTED TO SAV. REMOVED AND REPLACED NR 1 ENGINE OIL PRESSURE SWITCH LINE. (M)