What was found
DURING CLIMB AT 25,000 FT, LT ENGINE LOW OIL PRESSURE WARNING ILLUMINATED 23 PSI 2-3 SECONDS AS PER QRH REDUCED THRUST LEVER, OIL PRESSURE STAYED BETWEEN 30-40 PSI LOW OIL PRESSURE ILLUMINATED. REMOVED AND REPLACED ENGINE NR 1 HYD ENGINE DRIVEN PUMP O-RINGS AT ENGINE NR 1 HYD EDP AXIS F CARBON SEAL AND MATING RING, OPS AND LEAK CHECK GOOD, IAW AMM 72-60-00, SUPP 05-018A. (M)