As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AT FLIGHT LEVEL 350 EXPERIENCED RAPID DECOMPRESSION, FLIGHT DESCENDED UNDER MANUAL AND REGAINED CONTROL AT FL260. MANUALLY DEPLOYED OXYGEN MASKS. TRIED AUTO PRESSURIZATION AGAIN, NO LUCK. MAINTENANCE CHANGED #2 PRESSURIZATION CONTROLLER AND SYSTEM CHECKED.