As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER SHUTDOWN, AS RAMP PERSONNEL CHECKED TO ENSURE THE AFT CARGO HOLD WAS EMPTY, THE CRG AFT SMOKE MESSAGE ANNUNCIATION ON THE EICAS FOR APPROXIMATELY 10 SECONDS, THEN EXTINGUISHED. NO ABNORMALITIES VISIBLE IN THE AFT CARGO HOLD. REMOVED FROM SERVICE. PERFORMED GVI OF AFT CARGO. FOUND NOTHING OUT OF THE ORDINARY. EVERYTHING LOOKS GOOD. PERFORMED FIRE PROTECTION SYSTEM TES IN REF WITH E175 AMM TASK 26-00-00-700-801A. OPERATIONS TEST PASSED. RETURNED TO SERVICE.