As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EICAS MESSAGE 'FUEL IMB' VISUALLY NOTED FUEL LEAK FROM NR 4 ENGINE. ACCOMPLISHED SHUTDOWN PROCEDURES FOR NR 4 ENGINE. TROUBLESHOT FOUND NR 4 ENGINE HMU PERFORMANCE PACKING BADLY DAMAGED. PACKING REPLACED IAW MM 73-21-14. GROUND RUN FOR LEAK CHECK TEST 2, ECU ACTUATOR GROUND TEST 12, AND IDLE LEAK CHECK TEST 3 IAW MM 71-00-00 PAGE 501, ALL FOUND NORMAL. A/C DIVERTED TO BKK. (M)