What was found
TOP OF DESCENT FLIGHT DECK HAD A FAINT SMOKY SMELL FOR 3-4 MINS. DUE TO HISTORY OF OIL SMELL, REVIEW TROUBLESHOOTING ACP'D (CHP 21, 36, 49, 71, 72, 79), IF OIL SMELL IS REPORTED AGAIN, TO PREVENT IRREG OPS, REPLACE LEFT ENGINE PER AMM71-00-02 (401). LABEL REMOVAL REASON AS "CHRONIC OIL SMELL" OPBLM TOMC- 31OCT12. REPLACED ESN 727142 WITH ESN 726522 IN POS 01 PER TOD AMM 71-00-02 CONFIG 2 PB400. REF AMIS SEQ 7462017 #1 ENG WAS REPLACED. ACP'D AMM 21-00-01 PB100 AND FOUND NO RESIDUAL ODOR AFTER ENGINE CHANGE.