What was found
PDX - FIRE SYSTEM FAULT MESSAGE DISPLAYED. MAINTENANCE FOUND THE UPPER DETECT LOOP B TO BE AT FAULT. REPLACED DETECTION LOOP. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
PDX - FIRE SYSTEM FAULT MESSAGE DISPLAYED. MAINTENANCE FOUND THE UPPER DETECT LOOP B TO BE AT FAULT. REPLACED DETECTION LOOP. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.