As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - INTERIM FIRE SYS FAULT STATUS MSG DISPLAYED. PLACED ON MEL 26-00-1. CLEARED 1-23. MDC FAULT HISTORY SHOWED "R ENG FIRE LOOP B SHORTED INTERMITTENT". ON VISUAL INSP OF R ENG FIRE LOOPS FOUND W16 HARNESS WIRE A238 (RED) TO BE CHAFED THRU. REMOVED AND REPLACED WITH NEW RT W16 HARNESS IAW CRJ MM TASKS 26-11-07-000-802-A01 AND 26-11-07-400-802-A01. OP CHECK GOOD CLEAR MEL. RETURNED TO SERVICE.