What was found
STATUS MESSAGE LT ENGINE FIRE LOOP 1 INTERMITTENT, BUT REGULAR. TRANSFERRED TO MDDR 136787, IAW MEL 26-11-01-01 CAT C DUE 06NOV20. ETOPS 120 RESTRICTED. CVG C/W W/O 27520, IAW AP -17971, STEPS 1-3, ALL RESISTANCE VALUES ARE WITHIN LIMITS. REMOVED & REPLACED LOWER AFT FIRE LOOP ON NR 1 ENGINE, IAW AMM 26-11-02. OPERATIONS CHECK GOOD AT THIS TIME. THIS CLEARS DMI NR 136787. MCC NOTIFIED. PLACARDS REMOVED YK AT 1547.