As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL-FLL - FLT 803 - WHLE CRUISING AT 35,000 FT THE AIRCRAFT LOST PRESSURIZATION AND THE OXYGEN MASKS DEPLOYED. THE AIRCRAFT DIVERTED TO MCO AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED DEBRIS FROM THE AFT PRESSURE RELIEF VALVE AND REPLACED THE GROUND AIR CHECK VALVE. (M)