As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH LT ENGINE FIRE INDICATION INTERMITTENT AND THEN WENT OFF. MTX T/S ENGINE FIRE DETECTION STSYEM. FOUND LT FIRE LOOP "A" TEST SYSTEM FAILED. TRANSFERRED TO DMI 4568. IN REFRENCE TO DMI 4568: RERACKED LT ENGINE FIRE DETECTOR CONTROL UNIT AS PER AMM 26-10-03. OPS CHECK NORMAL AS PER AMM 26-10-00. THIS ACTION CLEARED DMI 4568.