As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON LANDING DIFF NG LIGHT ILLUMINATED ALONG WITH A NG T4 DROP ON ENG 2 FOLLOWED BY AN NR OVER SPEED ALARM & HIGH NG ON ENG 1 & HIGH NR RPM. PILOT REDUCED THROTTLES TO CONTROL NG & NR. NR DID NOT EXCEED 300 RPM. FOUND FAULTY FCU. REPLACED FCU WITH OVERHAULED UNIT ON NR 1 ENG.