As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT CREW NOTICED FUMES/OILY SMELL WHEN APU BLEED AIR WAS ACTIVATED . SMELL ESPECIALLY STRONG AROUND ROW 26. C/W W/C 0550-2002 CLASSIFED AS TYPE 1 APU LEAK. C/W W/C 4900- 2001 PLACED APU ON MEL REF LOG 7967753 . C/W LEVEL B DECONTAMINATION OF THE ECS AND DUCTS PER A320 AMM 21-00-00 AND AMM 36-10-00 . CONTACTED MCC NO 1261830.NO ODORS PRESENT. OK FOR SVC REF. MDLOG 1261830. (LP: 7967752)