As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE APU B FIRE DETECTION FAULT LIGHT, AND APU FIRE WARNING LIGHT ILLUMINATED INTERMITTENTLY. COM PROCEDURE ACCOMPLISHED. AIRCRAFT CONTINUED AND LANDED WITHOUT INCIDENT. NRT MAINTENANCE REPLACED APU FIRE CONTROL CARD. OPERATIONAL CHECK GOOD.