As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, NR 4 ENGINE WENT TO 103 PERCENT RPM, AT THE SAME TIME ENGINE TORQUE, TIT AND FUEL FLOW READINGS WERE DECREASING. SHUT DOWN NR 4 ENGINE AND LANDED WITHOUT INCIDENT. FOUND NR 4 VALVE HOUSING DEFECTIVE. REPLACED NR 4 VALVE HOUSING, OPS CHECKED IAW J/C 7101 AND 7101-2.