What was found
DCA - ON CLIMB-OUT, LEFT ENGINE OIL PRESSURE WARNING LIGHT ILLUMINATED. POWER REDUCED TO FLIGHT IDLE AND THE LIGHT EXTINGUISHED. THE AIRCRAFT DIVERTED TO BWI LANDING WITHOUT INCIDENT WITH THE LT ENGINE AT FLIGHT IDLE. MAINTENANCE DISPATCHED TO THE AIRCRAFT AND FOUND AN O-RING IN THE AXIS O-RING IN THE AXIS BB SEAL HAD FAILED. MAINTENANCE REMOVED AND REPLACED THE SEAL, PERFORMED THE REQUIRED GROUND RUNS AND RETURNED THE AIRCRAFT TO SERVICE. (X)