As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3805 - ATB - PRESSURIZATION. DURING CLIMB THROUGH 10K FEET, AIRCRAFT WOULD NOT PRESSURIZE IN AUTO OR MANUAL MODES. CORRECTIVE ACTION: PERFORMED PACK CONTROLLER BITE CHECK. #1 CONTROLLER FAULTED HIGH FLOW RATE OUTFLOW VALVE OPEN. #2 CONTROLLER CHECKED GOOD. REPLACED #1 CONTROLLER AND AFT OUTFLOW VALVE PRECAUTIONARY. SINGLE PACK CONFIDENCE CHECK GOOD. AIRCRAFT RETURNED TO SERVICE. (4979342).