As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BLEED AIR SMELL VERY STRONG ON DESCENT. REMOVED FROM SERVICE. CDS HAD NO RELATED FAULTS. C/W ODOR CHECKLIST REF FORM M-744. C/W MCN 62172-01,TROUBLE SHOOTING COMMON SMELLS ON AIRCRAFT. C/W Q400 AMM 21-00-00-160-801, REMOVAL OF ODOR FROM AIR COND. DUCTS.NO NOTICEABLE ORDER DURING GROUND RUNS. A/C OK FOR SERVICE. AIRCRAFT RETURNED TO SERVICE.