As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 4 ENGINE QUIT RUNNING AT CRUISE FLIGHT 16,000 FT. MAINTENANCE INSPECTED NR 4 ENGINE, NO DEFECTS NOTED. EVIDENCE OF INGESTION OF EXTERNAL LEAKAGE. CODE ON ECU. PERFORMED GMD RUNS AT BWR NO DEFECTS NOTED OVERSPEED FAIL DSI LIGHT ONLY. REPLACED OVERLAPED CONTROL BOX P/N 2-313-007-01. NO FURTHER FAULTS FOUND WITH ENGINE.