As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDA 2 DISCOVERED AFTER LANDING AND ETOPS PDC THAT THE LOWER PRESS RELIEF VALVE ON UPPER FLAPPER DOOR MISSING. REMOVED AND REPLACED LOWER PRESSURE RELIEF VALVE REF AMM 21-32-01-402-009 COMPLETED STEPS UP. VAVLE REPLACEMENT REQUIRES STATIC SYSTEM LEAK CHECK. LEAK CKD OK.