As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT LOST PRESSURIZATION DURING CLIMB THROUGH FL 200. AIRCRAFT RETURNED TO MAINTENANCE BASE FOR REPAIR. DUCT TEMP LIMITER FOR CABIN PRESSURIZATION FOUND BROKEN AT MOUNT BASE AND WAS REPLACED WITH AN UPDATED, IMPROVED PART IAW A FACTORY SUPPLIED AIRCRAFT MODIFICATION KIT (AMK).