As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN CRUISE FLIGHT AT FL250, RECEIVED AND EICAS MESSAGE (E1 FIRE DET FAIL). FOLLOWED CHECKLIST, UNSURE OF WHETHER MESSAGE WAS ASSOCIATED WITH AN ENGINE FIRE DUE TO LACK OF THE ENGINE FIRE INDICATION. EXECUTED A PRECAUTIONARY ENGINE SHUTDOWN AND LANDED AT A SAFE, SUITABLE AIRPORT. REMOVED AND REPLACED NR 2 ENGINE FIRE DETECTOR LOOP IAW MM 26-11-01. OPS CHECK GOOD.