As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYS - ON OVERNIGHT CHECK, FOUND NR2 ENG EVIDENCE OF OIL LEAK IN BYPASS AREA. REMOVED NR2 ENG AIR/OIL HEAT EXCHANGER AND VALVE ASSY IAW AMM 79-21-09 (HA11068), INSTALLED AIR/OIL HEAT EXCHANGER IAW AMM 79-21-09. OPS AND LEAK CHECK PENDING. GROUND RUN AND LEAK CHECK OK, OK FOR SVC.