As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOSS OF PRESSURIZATION OCCURRED DURING CLIMB THROUGH 17,000 FEET. OXYGEN MASKS WERE DEPLOYED THROUGHOUT CABIN AND FLIGHT WAS RETURNED TO RDU. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND OUTFLOW NOZZLE VALVE RUBBING AGAINST HYDRAULIC SUPPLY LINE CLAMP. REPOSITIONED CLAMP. ALSO REPLACED CABIN PRESSURE ANEROID SWITCH. OPERATIONAL CHECK NORMAL.