What was found
FLIGHT 5219 - AIRCRAFT WOULD NOT PRESSURIZE AFTER TAKEOFF FROM BOS. AIRCRAFT RETURNED TO BOS AND LANDED SAFELY. FOUND CABIN PRESSURE CONTROLLER FAULTY. DEFERRED PER MEL 21-31-01-1.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLIGHT 5219 - AIRCRAFT WOULD NOT PRESSURIZE AFTER TAKEOFF FROM BOS. AIRCRAFT RETURNED TO BOS AND LANDED SAFELY. FOUND CABIN PRESSURE CONTROLLER FAULTY. DEFERRED PER MEL 21-31-01-1.