What was found
DURING FLIGHT, NR 2 ENGINE OIL QUANTITY DECREASED. FLASHING ADVISORY BEGAN AT 5.0 LOWEST LEVEL NOTED WAS 3.5 QTS ON APPROACH NR 2 PSI AND TEMP WERE NORMAL. AFTER ENGINE SHUTDOWN OIL QTY WAS AT 10QTS. SERVICED THE OIL QTY WITH 12 QTS OF OIL IAW AMM 12-13-79 PB301.A. EXAMINE ENGINE, NO LEAKS NOTED. INSPECTED FCOC, NO DEFECTS NOTED IAW AMM 79-21-43-200-010-B. R & R OIL SCAVENGE PUMP IAW AMM 79-22-41. LEAK CHECKED GOOD IAW AMM 71-00-00-710-012. REMOVED & REPLACED NR 2 ENG DEOILER BREATHER SEAL ASSY IAW AMM 72-60-31 PB401. REMOVED & REPLACED NR 4 BEARING SCAVENGE VALVE IAW AMM 79-23-51 PB401. PERFORMED BORESCOPE INSPECTION OF NR 2 ENG HP COMPRESSOR IAW 72-00-00-200-016B. NO DEFECTS NOTED. PERFORMED BORESCOPE INSPECTION OF STAGE 1 HPT BLADES, DUCT SEGMENTS STAGE 2 HPT BLADES, DUCT SEGMENTS INSIDE COMBUSTION CHAMBER, & HP TURBINE STAGE 1 VANES IAW AMM 72-00-00-00-200-013/ 014, 015, NO DEFECTS NOTED. ACCOMPLISHED HIGH POWER ASSURANCE TEST IAW AMM 71-00-00-710-013-C, TESTED OK. PERFORM ENGINE RUN AT FLIGHT IDLE FOR 45 MINUTES IAW AMM 71-00-00, TESTED OK. OIL COMBUSION WAS 0.5 OIL QTS FOR 1 HOUR OF ENG RUNNING. FLIGHT TESTED SATISFACTORY.