As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#778, LAS-BOS. (ETOPS) 'ENG 1 OIL CHIP DETECTED ON TAXI INTO GATE; UPON FURTHER T/S, ESN P770520 WAS FOUND WITH #3 SEAL CARBON NESTING. ENGINE REMOVED AND INSTALLATION WAS ACCOMPLISHED UNDER W/O 1309730 A/C OK FOR SERVICE. UPON FURTHER T/S IT WAS DETERMINED ESN P770520 TO HAVE CARBON SEAL #3 NESTING PER POWERPLANT ENGINEERING & P/W, #1 ENG REQUIRES REPLACEMENT. THIS WAS ACCOMPLISHED UNDER WO 1309730 A/C OK FOR SERVICE.'