As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LGW - 50 - LT ENG OH LP 1 STATUS MESSGE ANNUNCIATED ON LOWER EICAS. PERFORMED TROUBLESHOOTING AS PER MM 26-11-00-1 OH LOOP 1 FOUND INOPERATIVE NIL SPARES LGW ITEM DEF PER MEL 26-02B AU 2-364D-A ENT IN MICS PLACARDED RAISED. TROUBLESHOT SYSTEM AND REPLACED FAULTY L ENG OVERHEAD LOOP DETECTOR ASSY PER MM 26-11-02-4 OVERHEAT DET TEST OK ON EICAS. REMOVED PLAC 2-364D-A. CLEARED MIC SHEET. (M)