As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU "A" FIRE LOOP INTERMITTENT WITH BELL. TROUBLESHOT SYSTEM FOUND "A" LOOP LIGHT ASSY HAS MASTER DIM/TEST TERMINAL BROKEN ON LIGHT ASSY IT'S SELF. LIGHT NR 6 PER WDM 26-15-11 DMI 543 CONTINUES. REMOVED AND REPLACED APU CONTROL PANEL PER AMM 31-10-00 SYSTEM OP'S CHECKED NORMAL PER 49-10-00.