As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENG 2 FIRE DET FAIL CAUTION MSG WHILE CLIMBING OUT OF BNA ABOVE 13,000. MSG GOT CLEARED ON ITS OWN; FOLLOWED QRH - NO INDICATION OF FIRE FOUND ON ENG 2 (FLIGHT 5738 FILED CLOSED)**** REPEATER **** REMOVED AND REPLACED GENERIC I/O MODULE (MAU 1 SLOT 11,12) IN REF WITH ERJ175 AMM 31-41-06. NO DEFECTS NOTED AT THIS TIME. AC GOOD FOR SERVICE.