What was found
AFTER T/O HAD OIL SMELL ACCOMPANIED BY FAINT BLUE SMOKE IN CABIN. POM PROCEDURE ISOLATED NR 2 PK AS PROBLEM. SMOKE/SMELL DISIPATED WHEN NR 2 PACK TURNED OFF. HOWEVER, ON DESCENT SMOKE/SMELL REAPPEARED BRIEFLY THAN DISAPPEARED. RAN ENGINES TO PWR, ISOLATED 1 AND 3 ENGINE BLEEDS THAN NR 2. FOUND OIL SMELL NR 2 ENGINE WITH NR 2 PK ON. FWD NR 2 HP BLEED TO MCO AND PLA PER MEL 36-1101. NR 2 PK OK WITH NR 2 BLEED OFF.