As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EINN - FLT 4124 - ON CLIMB-OUT, ENGINE NR 1 B-FIRE LOOP ILLUMINATED, LOOP A TEST NORMAL. RETURNED TO AIRPORT. REPLACED NR 1 ENGINE HORIZONTAL FIREWALL SENSOR ASSEMBLY PER 26-11-03. TEST NORMAL IAW MM 26-11-03. OK FOR RETURN TO SERVICE. (M)