As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - INTERMITTENT "C" FIRE FAIL CAUTION UPON THRUST REDUCTION AT TOP OF DESCENT. MDC REPORTS L ENG FIRE LOOP A INSPECTED LOOP FOUND LOOP 235 CHAFED. REMOVED AND REPLACED FIRE DETECT RAIL IAW CRJ 700 AMM TASK 26-11-03-000-810 AMD 26-11-03-400-801 FOR INSTALL OF NEW FIRE DETECT LOOP 235 AS REQUIRED. ALL OPS TEST ARE GOOD, NO DEFECTS NOTED. RETURNED TO SERVICE.