As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS - PRIOT TO DEPARTURE AVIONICS VENT OUTLET VALVE FAULT(STUCK IN HALF OPEN POSITION) MANUAL RELEASE HANDLE ALSO STUCK // REMOVE & REPLACED AVIONICS VENT OUTLET VALVE IAW AMM 21-26-53-000-002-A/400-001-A. OPS TEST GOOD PER AMM 21-26-00-710-001-A. O TO CONTINUE.