As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 5348850) AT T/O PWR SMELLED OILY UNTIL INITAL CLIMB PHASE THEN NO SMELL, AT IDLE POWER IN TRAFFIC PATTERN SLIGHT OIL SMELL CAME BACK. C/W NO GO ODI PROCEDURES. T/S PER B737 FIM 21-00 TASK 806. FOUND DIRTY SOCK SMELL. PREFORMED DUCT BURNOUT OF LEFT AND RIGHT ENGINES. NO SMELL REMAINS. R/R RECIRC FILTERS PER B737 AMM 21-25.