What was found
FLT#197, BOS-SEA. (ETOPS) 'SPURIOUS ECAM FOR ENG 2 FIRE LOOP A FAULT ( ENGINE FIRE DETECTION SYSTEMS 1) LOOP A ); REPLACED LOOP A (3WD2) IAW 26-12-26 OPS CHECK GOOD, TEST PASSED NO FAULTS NOTED AT THIS TIME, MX-4 UPDATED PLACARD REMOVED, MCC NOTIFIED.