As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE INSPECTION WHILE TROUBLESHOOTING FOUND NR 1 ENGINE FIRE DECT HARNESS WIRE W 4070012-20 SHORTED TO SHIELDING. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE ENGINE NR 1 HARNESS FOR FIRE DETECTION SYSTEM IAW EMB 145 AMM 71-51-01. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.