As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#2289, AMS-JFK. (ETOPS) 'ENG #1 FIRE LOOP A FAULT ( ENGINE FIRE DETECTION SYSTEMS 1) LOOP A ); PERFORMED TSM 26-12-00-810-803-A. NO HARD FAULTS ON ECAM FAULT. PERFORMED GVI ON LOOPS, NO DEFECTS NOTED. PERFORMED RESISTANCE CHECK ON FDU BETWEEN JULIET AND KILO. RESISTANCE AT 1.4 KILO OHMS. WITHIN LIMITS. REPLACED FDU AS PRECAUTIONARY IAW AMM 26-12-34. OPS CHECK NORMAL.