As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FIRE HANDLE LIGHT ILLUMINATED (APU NOT RUNNING). ALL PROCEDURES FOLLOWED. REMOVED AND REPLACED APU FIRE WARNING MODULE. ALSO, REPLACED FIRE LOOP PINS AND CONNECTOR, OPS CHECKED GOOD. RECOMMENDATION: REMAIN OPEN PENDING REVIEW OF TEARDOWN REPORT.