As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WE WERE LEVEL AT FLIGHT LEVEL 350 WHEN THE (APU FIRE LIGHT) AND BELL CAME ON. WE FIRED THE BOTTLE AND THE FIRE LIGHT STAYED ON. REMOVED AND REPLACED RT FIRE BOTTLE IAW MM 26-20-05. FIRE LOOP FOUND BAD AND REPLACED. APU FIRE DETECTION SYSTEM WAS OPS CHECKED AND CHECKED GOOD.