As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: CABIN PRESSURIZATION WOULD NOT PRESSURIZE DURING CLIMB. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT MIA. PERFORMED BITE TESTS TO BOTH CABIN PRESSURE CONTROL 1 AND 2 NO FAULTS NOTED PER AMM 21-31-00. PERFORMED CABIN PRESSURIZATION TEST AND ALL INDICATIONS WERE NORMAL PER AMM 21-31-00. CHANGED CABIN RATE OF CLIMB INDICATOR PER AMM 21-33-01. OPERATIONAL CHECK NORMAL.