What was found
AIRCRAFT WAS GROUNDED: OIL SMELL IN FLIGHT AND ON THE GROUND WITH BOTH PACKS AND ENGINE BLEEDS ON, APU OFF, SMELL GOT BETTER WITH PACK #1 OFF. **SUPPLEMENTAL REPORT FOR AALA202308011710: MAINTENANCE CLEANED THE APU OIL COOLING FAN INLET AND EXHAUST DUCTS, ALONG WITH CLEANING THE APU INLET. A DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM WAS ACCOMPLISHED. ** (CLOSED)