What was found
FLT 9 - COS TO ONT - FLIGHT CREW REPORTED BAG SMOKE INDICATION IN-FLIGHT. CONTRACT MX PERSONEL INSPECTED CARGO COMPARTMENT AND NO ABNORMALITIES WERE NOTED. AIRCRAFT WAS RELEASE IN ACCORDANCE WITH MEL 26-15-00 CAT -C- CONTROL 126970. WHEN AIRCRAFT ARRIVED TO ONT, EXPRESSJET MX PERSONEL REMOVED THE FWD AND THE AFT BAGGAGE COMPARTMENT SMOKE DETECTORS (FWD: P/N 473597-13, S/N 1777 TSN 14842 CSN 11464 TSO 14842. AFT:P/N 47359-13, S/N 2935 TSN 10975 CSN 8517 TSO 10975) AND REPLACED THEM. OPERATIONALLY CHECK WITH NO DEFECTS AND THE AIRCRAFT WAS APPROVED TO RETURN FOR SERVICE.