What was found
DURING DECENT AT 5000 FT, STARTED SMELLING OIL, ALSO DURING ENTIRE FLIGHT. CHECKED OIL PRESSURE, WENT FROM 63 LBS TO 88 FLUXUATION THE ENTIRE FLIGHT. AFTER DESELECTING THE NR 1 PACK. THE ODOR WENT AWAY. RESELECTED PACK AND ODOR CONTINUED. AT ALL OTHER ALTITUDES NO ODOR, JUST OIL PRESSURE ISSUE. REMOVED AND REPLACED THE LT ENGINE IAW WC 71-000-00 , PERFORMED NRWC 692-CMI-03269 FOR DUCT DECONTAMINATION AND ODOR EVENT. TROUBLESHOT COMPLIANCE IAW ETN-EM-72-034. OPS & LEAK CHECKED GOOD, NO ODOR NOTED.