As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING PILOT OPERATIONAL CHECK, NR 4 ENGINE DID NOT SHUT DOWN WITH THE OVERSPEED STOP. NR 4 ENGINE OVERSPEED CONTROLLER REPLACED AND NR 4 ENGINE OVERSPEED TEST CARRIED OUT IAW AMM 71-00-00 BLOCK 501. TEST COMPLETED AS SERVICEABLE AND AIRCRAFT WAS RETURNED TO SERVICE.