As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, APU FIRE LIGHT ILLUMINATED WITH BELL. LIGHT AND BELL EXTINGUISHED WHEN FAULT TEST WAS ACCOMPLISHED. AIRCRAFT CONTINUED ON TO DESTINATION AND LANDED WITHOUT INCIDENT. MAINTENANCE PUT APU FIRE LOOP B ON MEL. MAINTENANCE FOUND CHAFED WIRE AND REPAIRED. OPERATIONAL CHECKS OK.