What was found
FLIGHT 5519 - AFTER DEPARTURE FROM JFK THE OXYGEN SERVICE DOOR OPENED. CREW DECLARED AN EMERGENCY AND RETURNED TO THE FIELD. FLIGHT LANDED WITHOUT INCIDENT. SECURED OXYGEN SERVICE DOOR CLOSED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLIGHT 5519 - AFTER DEPARTURE FROM JFK THE OXYGEN SERVICE DOOR OPENED. CREW DECLARED AN EMERGENCY AND RETURNED TO THE FIELD. FLIGHT LANDED WITHOUT INCIDENT. SECURED OXYGEN SERVICE DOOR CLOSED.