As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED THAT NR 1 ENGINE LOSING 1QUART IAW FLIGHT HR AND BELIEVE LEAKING INTO BLEED SYS CAUSING AN ODOR DURING CRUISE. CREW TURNED OFF THE NR 1 BLEED SYS AND ODOR WENT AWAY. MAINTENANCE REPLACED THE NR 1 ENGINE FUEL OIL COOLER AND ACCOMPLISHED A SATISFACTORY LEAK AND OPS CHECK IAW AMM 79-21-43.