As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MADE T/O WITH T/O CONFIG TEST SW SHOWING MAIN DECK DOOR NOT CLOSED PER MEL MX HAD VERIFIED ALL DOORS CLOSED & LOCKED AND DOORS ON ECAM WERE INDICATING CLOSED AND LOCKED. ON CLIMBOUT AT APPROX 4 PSI & 13,000 FT MSL MAIN CARGO DECK LIGHT ON ECAM WENT AMBER. NO CHANGE IN PRESSURE AND RIGHT ECAM DOOR PAGE VERIFIED AMBER LIGHT MAIN CARGO DOOR. EMERGENCY RETURN TO KOAK AND ECAM LIGHT WENT OUT ON LANDING. LANDING WEIGHT 327.3 DESCENT RATE= 220FT/MIN. HEAVY LANDING INSPECTION / WRI 05-50/2169. ALL SYSTEMS NORMAL.