As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON SHORT FINAL AT APPROXIMATLEY 2300 FEET, DURING APU START SEQUENCE, APU FIRE LIGHT ILLUMINATED AND FIRE BELL SOUNDED. FIRE HANDLE PULLED AND ROTATED. LIGHT WENT OUT. APU SHUTDOWN, FIRE SYSTEM TESTED OK. INSPECTED APU ASSEMBLY SECTION. NO EVIDENCE OF FIRE NOTED. REMOVED AND REPLACED APU FIRE BOTTLE.