As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENG B FIRE LOOP INOP #1 ENG B FIRE LOOP INOP 16-JUN-2024 06:50 UTC R&R ENGINE AND APU FIRE DETECTION MODULE IAW AMM 25-10-01 OPS CHECK GOOD.<[01] COULD NOT DUPLICATE FAULT ON GROUND; FOUND ENGINE AND APU FIRE CONTROL MODULE WITH MULTIPLE TEST LIGHTS INOP. R&R ENGINE AND APU FIRE CONTROL MODULE PER AMM 26-10-01.