As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT EXPERIENCED A LOSS OF CABIN PRESSURE WHILE CLIMBING AT 30,000. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO CRQ. MAINTENANCE VENDOR TROUBLESHOT THE PRESSURIZATION ISSUE TO A FAULTY PRESSURIZATION CONTROLLER (52770-116). THE CONTROLLER WAS REPLACED WITH AN OVERHAULED UNIT. A MAINTENANCE CONFIDENCE FLIGHT WILL BE PERFORMED IN ACCORDANCE WITH LATITUDE 33 GMM SECTION 6.25 BEFORE THE AIRCRAFT RESUMES PASSENGER OPERATIONS.