What was found
DURING AFTER TAKEOFF CHECK NOTED DUCT SPLIT 17L/40R AT 18,000 20L/40R AT 35,000 21L/38R #2 EGT 40-90' HIGHER THAN #1 DEPENDING ON PHASE OF FLIGHT #2 OIL PRESS 5-10 PSI HIGHER THAN #1, #2 FUEL FLOW HIGHER THAN #1. GROUNDED - YES. REMOVED AND REPLACED SENSE LINE - REMOVED AND REPLACED PRSOV REF. B737-800 AMM TASK 36-11-04-000-801 AND TASK 36-11-04-400-801 SUPPLIED BLEED AIR FROM THE APU AND LEAK CHECKED THE BLEED AIR SYSTEM NO LEAKS NOTED - SYSTEM OP'S NORMAL - REMOVED POWER FROM AIRCRAFT FOR OPENING AND CLOSING ENG. COWLS AND T/R.