As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OIL QTY ON NR 2 ENGINE SLOWLY DROPPED. WHEN THE OIL QTY REACHED ONE QUART, CREW SHUTDOWN ENGINE AS A PRECAUTION. REPLACED BLOWN SEAL ON THE IN LINE FUEL/OIL HEAT EXCHANGER IAW AMM 79-21-01. ENGINE RAN FOR 30 MINS WITH NO LEAKS OR QTY LOSS.