What was found
FLIGHT 2187. AFTER TOUCHDOWN RECEIVED BOTH CARGO AFT FIRE SYS FAIL & CRG FWD FIRE SYS FAIL EICAS MASTER CAUTION. MESSAGE EXTINGUISHED APPROX 1 MIN LATER. REMOVED FROM SERVICE. INTERROGATED CMC AND FOUND FAULT CODE 26230053UT1. PERFORMED FIM 26-23-00-810-806-A STEPS 1-7D, RESET PASSED, DETERMINED TO BE TRANSITORY. FAULT NO LONGER ACTIVE. NO PARTS REPLACED REYURNED TO SERVICE,