As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT #6122, RIC-MCO(DIVERTED TO JFK). AFTER TAKE-OFF THE AIRCRAFT DID NOT PRESSURIZE WITH EITHER AUTO PRESSURIZATION SYSTEM, MANUAL PRESSURIZATION WAS OPERATIVE. DIVERSION TO JFK NECESSARY; CPC 1 FLAGGED ON "PFR". R & R CPC1.VERIFIED OUTFLOW VALVES CLEARED OF OBSTRUCTIONS. PERFORMED OPERATIONAL CHECK OF CPC 1 CPC 2. ALL OPERATION WAS NORMAL IN ATO/MANUAL.REF TO AMM 21-31-34-00-001-A