As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENG 1 FIRE LOOP B STATUS MSG DISPLAYED ON EICAS. MX MSG 26021, CMC GND TEST WOULD NOT RESET STATUS MSG. IAW FIM 26-11 TASK 852, ENG 1 FIRE WARNING DETECTION CARD LOOP RESISTANCE CHECK WITHIN LIMIT, 1.512 KOHM, FOR PRECAUTION DETECTION CARD. REPLACED IAW MM 26-10-01 & CMC GND TEST PASSED, NO MSG FOUND.