What was found
(B18208) ENG-4 UNABLE TO SHUTDOWN AFTER FUEL CONTROL SWITCH BACK TO CUT OFF POSITION, EICAS SHOWS "ENG 4 FUEL VLV" MESSAGE, THEN THE ENGINE GOT SHUTDOWN ITSELF ABOUT 15 SECONDS AND NR 4 FIRE HANDLE HAS BEEN PULLED. MX INTERROGATE CMC FOUND "ENG 4 FMU SHUTOFF VALVE (74077)" MSG. PERFORM ENG 4 FMU ELECTRICAL C/P CLEANING IAW FIM 71-00 TASK 919-921. PERFORM ENG 4 AUTOSTART TEST IS FAILED, THEN DO MANUAL START IS SUCCESSFUL, ITEM C/F TO DD. QAR READOUT AND ANALYSIS IS UNDER PROGRESS.