As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STATUS MSG APU FIRE LOOP 1 AND APU FIRE LOOP 2 ALONG WITH MASTER WARNING FIRE LIGHTS AND FIRE DISCRETE LIGHT ILLUMINATED. REMOVED AND REPLACED APU LOGIC FIRE CARD, OPS CHECK GOOD. RECOMMENDATION: REMAIN OPEN PENDING REVIEW OF TEARDOWN REPORT M+E = 19-2610-9-0003.