As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ON CLIMB OUT AT 14,000 FEET AIRCRAFT PRESSURE FLUCTUATES UNCONTROLLABLY. FLIGHT RETURNED TO CLT LANDING SAFELY. REPLACED CABIN PRESSURE CONTROLLER #1 (AALA202204058333) AND CABIN PRESSURE CONTROLLER #2 (AALA202204053319) PER AMM 21-31-34. REPLACED SYSTEM DATA ACQUISITION CONCENTRATOR (SDAC) #2 (AALA202204052554) PER AMM 31-55-34. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.