As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY DECLARED. FLIGHT DIVERTED DUE TO A PRESSURIZATION PROBLEM. AFTER RAPID DESCENT, INDICATIONS RETURNED TO NORMAL AND EMERGENCY WAS CANCELLED. MASKS DID NOT DEPLOY. LANDING UNEVENTFUL. REMOVED AND REPLACED THE NR 2 CABIN PRESSURIZATION CONTROLLER IAW AMM 21-30-00. OPERATIONAL CHECKED GOOD. AIRCRAFT WAS GROUNDED.