As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM - ENG 2 AIR EX-CHANGER FAULT. // PERFORMED TSM TASK 79-20-00-810-810-A. BITE CHECK OF FADEC SYSTEM INDICATED NO FAULTS. PERFORMED GVI OF AIR/ OIL HEAT EX-CHANGER FOR DAMAGE. NON FOUND. OPERATED VALVE AND FOUND MOVEMENT IS FREE AND SMOOTH. INSPECTED HARNESSES TO VALVE AND FOUND UNDAMAGED. ALL CONNECTORS SECURED. OK FOR SERVICE.