As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) UPON DESCENT A RAPID DECOMPRESSION OF THE AIRCRAFT STARTED. EMERGENCY DESCENT CARRIED OUT AND LANDING WAS UNEVENTFUL. INSPECTION FOUND A LOOSE CLAMP ON THE ACM DUCT WHICH CAUSED NO INFLOW OF CONDITIONED AIR INTO THE CABIN AND THEREFORE THE LOSS OF CABIN PRESSURE.