As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE INSPECTION FOUND RELAY CLICKING NOISES COMING FROM BEHIND CAPTAIN'S SEAT. NOISE GOES AWAY WHEN GPU DESELECTED. AIRCRAFT REMOVED FROM SERVICE. FOUND FRAME 80 SHUNT BRACKET CORRODED THRU. REPAIRED IAW EO EM-53MR-2000. AIRCRAFT RETURNED TO SERVICE.