As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APU FIRE TEST EXTERNAL HORN WAS NOT HEARD. WARNING BELL AND LIGHT ON FLIGHT DECK OPERATED NORMALLY. TRANSFERRED TO DMI 13032 MEL REF 26-11-2 CAT C. REFER TO DMI 13032; REMOVED AND REPLACED APU WARNING HORN AND PERFORMED ADJ/TEST PER BMM 26-15-0. OPS CHECKED NORMAL. THIS CLEARS DMI 13032, PLACARD REMOVED.