What was found
PDX- NR 2 CHANNEL B FIRE DETECTION LOOP WILL NOT TEST. CLEANED BOTH CONNECTOR PLUGS ON B LOOP HARNESS IN NACELLE AND AT CONTROLLER IN CLOSET. NO PARTS REPLACED. 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- NR 2 CHANNEL B FIRE DETECTION LOOP WILL NOT TEST. CLEANED BOTH CONNECTOR PLUGS ON B LOOP HARNESS IN NACELLE AND AT CONTROLLER IN CLOSET. NO PARTS REPLACED. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.