As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE ONE FIRE DETECT FAIL CAUTION MESSAGE ON TAKEOFF. REMOVED AND REPLACED NUMBER ONE ENGINE FIRE DETECTOR IAW EMB AMM 26-11-01 AND ENGINE PYLON FIRE DETECTOR IAW EMB 26-11-02. OPERATIONAL CHECKS GOOD ON BOTH COMPONENTS, RETURNED AIRCRAFT TO SERVICE.