As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, TURNED BLEED VALVES TO OPEN, AND HAD A RAPID RATE OFF DECELERATION IN CABIN RATE AND CABIN ALTITUDE. AIR RETURN TO CWA. MAINTENANCE RESET CABIN PRESSURE CONTROL CIRCUIT BREAKER. PRESSURIZATION SYSTEM OPS CHECK GOOD. VISUALLY INSPECTED WIRING BEHIND LT C/B PANEL. NO DEFECTS NOTED.