As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATL-PHL - FLT 534 - EN ROUTE, OXYGEN MASKS DEPLOYED AUTOMATICALLY DUE TO USE OF AUTO PRESSURIZATION SYSTEM PREVIOUSLY PLACED ON MEL AS INOP. RETURNED TO MANUAL PRESSURIZATION CONTROL AND REGAINED CONTROL. MASK PANELS AT SEAT 4 AB ROW 6 AND 7 AB AND 11 AB DID NOT DEPLOY. PLACED ON MEL 35-2-2 PAR F, G AND H.