As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED. ODOR THROUGHOUT A/C CABIN AND COCKPIT DESCENDING STARTED AT 70000 MSL TAT PLUS 12 DEGS SAT PLUS 10 DEGS. APU FOUND TO BE THE SOURCE DECONTAMINATED BLEED SYS APU PLACED ON MEL. SUPPLEMENTAL REPORTED TO BE PROVIDED LATER TO INCLUDE CORRECTIVE ACTION AND PART INFORMATION.