What was found
AFTER TAKEOFF AT SMF NR 1 ENG RPM ROLLED BACK TO 42 PERCENT EGT TO 992 AN HAD SEVERE VIBRATION. SHUTDOWN NR 1 IAW QRH. NOTE HAD NO FIRE WARNING IND. 1 FIRE BOTTLE USED- GND WITNESS OBS FLAMES FROM CENTER OF ENG. EXHAUST REMOVED AND REPLACED #1 ENG NR 1 FIRE EXTINGUISHER BOTTLE, PERFORMED STALL INSPECTIONS, OVERTEMP INSPECTIONS, FAIL TO RESPOND TO THROTTLE MOVEMENT TROUBLESHOOTING FOUND VSV OUT OF RIG ,CORRECTED, ALSO UPON ENGINE RUN FOUND BAD CIT SENSOR, REPLACED. OK FOR SERVICE.