As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EXTREMELY STRON SMELL ON FLIGHT DECK DESCENDING THRU 3000 WITH IDH POWER NO SMELL BACK CABIN PACK 1 WAS SHUTDOWN AND SMELL WENT AWAY AFTER 2-3 MINUTES FUME EVENT.-COMPLIED WITH TSM 5-50-00-310-831A AND FOUND PACK #1 AS THE CAUSE SEE ITEM 2969198-2 FOR CORRECTIVE ACTION