As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AT TOP OF DESCENT ODOR IN FLIGHT DECK (NOT ) CABIN DETERMINED AS MODERATE CATEGORY A IN QRH TURNED PACK 1 OFF ODOR DISSIPATED. MAINTENANCE ISOLATED SOURCE OF ODOR TO THE APU. **SUPPLEMENTAL REPORT WILL BE SUBMITTED** (OPEN)