As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL - THE CREW NOTICED A CABIN ODOR AFTER BOARDING THE AIRCRAFT. THE APU AND A/C SYSTEM HAS AN OIL SMELL WITH APU AIR OR EXTERNAL AIRSOURCE. MAINTENANCE ACCOMPLISHED JC FOR CABIN AIR QUALITY AND DECONTAMINATION OF THE ECS. AFTER AN UNSUCCESSFUL TEST FLIGHT THE APU WAS REMOVED AND REPLACED. AIR QUALITY AND JC FOR ENGINE CABIN ODOR WERE ACCOMPLISHED ON THE LEFT AND RIGHT ENGINES WITH NO DEFECTS NOTED AT THIS TIME.