As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOSS OF CABIN PRESSURIZATION OCCURRED AT START OF DESCENT FROM 26,000 FEET. OXYGEN MASKS WERE DEPLOYED THROUGHOUT CABIN AND EMERGENCY DESCENT WAS ACCOMPLISHED. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND DUCT BETWEEN LEFT AIR CYCLE MACHINE AND WATER SEPARATOR DISCONNECTED. REINSTALLED DUCT AT RUBBER SLEEVE AND HOSE CLAMPS, OPERATIONAL CHECK NORMAL.