What was found
MUSTY, OIL SMELL IN CABIN ON DESCENT, SMELL DISSIPATES WITH PACK 2 OFF. PERFORMED TROUBLESHOOTING OF CABIN OIL FUMES, IAW A319/A320 TSM 49-00-00-810-921A12. PERFORMED PRE-CONDITIONING WITH APU. NO FUMES IN CABIN IAW A319/A320 AMM 12-33-21-618-001-A.