As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
" E 1 FIRE DET FAIL" EICAS MSG APPEARED INTERMITTENTLY IN FLIGHT.-C/A-CHECKED RESISTANCE AND COTINUITY ON LH ENG AND PILON LOOP A AND B SATIFACTORY PER FIM 26-11-00 AND PERFORMED OPS CK OF ENG FIRE DETECT SYSTEM PER AMM 26-11-00 FOUND SYST WORKING PROPERLY