As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENG 1 OVERHEAT & FIRE DETSHOWS FAULT ON LOOP B. GROUNDED - YES. ACCOMPLISHED OPERATIONAL TEST AND BITE TEST OF THE FIRE DETECTION SYSTEM. NO FAULTS CURRENT. REMOVED AND REPLACED NR 1 ENGINE CORE DETECTORS M1759, M1760, AND M0326 HARNESS IAW AMM 26-11-01/401 AND AMM 26-11-02/401. GROUND VERIFICATION TEST IS GOOD.