As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
KLAX - APU 'A' LOOP FIRE DETECTOR FLICKERS IN FLIGHT. REMOVED AND REPLACED FIRE WARNING CONTROL CARD AND FIRE DETECTOR CONTROL CARD FOR APU 'A' LOOP SYSTEM. OPS CHECK GOOD IAW B747 MM 26-10-00 AND 26-15-00. DMI NR 248 CLEARED/PLACARD REMOVED. (M)