What was found
ENGINE FLAMEOUT AT FL350. RESTART ATTEMPTED DURING DESCENT/DIVERT. DURING RESTART ATTEMPT, OIL PRESSURE WENT TO "0" (ZERO). "ENGINE FIRE, OR SEVERE DAMAGE" CHECKLIST ACCOMPLISHED. DIVERTED. TO PIT. CHECKED MAIN OIL FILTER CHIP DETECTOR. DETECTOR IS VERY CLEAN WITH NO CHIPS OR FOREIGN MATERIAL AT ALL. DURING DRY MOTOR ENGINE NR 3 N2 IMMEDIATLY CLIMBS TO 45% AND OIL PRESSURE CLIMBS TO 24PSI QUICKLY. ENGINES 1 AND 2 MAX MOTOR AT 20% N2 AND OIL PRESSURE IS AT 10PSI. ALSO DURING DRY MOTOR NOTICED NO N1 ROTATION OF ANY KIND AND NO TURBINE ROTATION. WHILE OBSERVING ALSO NOTICED THAT THERE IS AN ABNORMAL SOUND PRODUCED BY THE ENGINE DURING MOTORING. MOCC NOTIFIED OF THESE IDICATIONS AND WE BELIEVE THAT THE TOWER SHAFT IS SHEARED. REMOVED AND REPLACED NR 3 ENGINE PER MD-10 ENGINE INSTALLATION POSITION NR 3 WORK CARD 71T0701-3 AND MD-10 ENGINE RUN-UP FORM COMPLETED.