As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE APU FIRE BOTTLE DISCHARGE LIGHT IS ILLUMINATED. ACFT GROUNDED. TROUBLESHOT TO THE APU FIRE BOTTLE IAW FIM 26-20 TASK 802. REMOVED AND REPLACED THE APU FIRE BOTTLE IAW T/C 78326000. OPS CHECKED GOOD AND APU FIRE BOTTLE DISCHARGE LIGHT IS NOT ILLUMINATED.