What was found
(CAN) ENROUTE ATL / DFW, ON TOP OF DESCENT. AT 33,000 FT HAD FOLLOWING: QTE MASTER CAUTION ILLUMINATED FOLLOWED BY A/C YAW AT 33,000 FT. LEFT ENGINE SHUTDOWN (AUTO) SUDDENLY. RED BOXED NR WERE VISIBLE, OIL PRESSURE & OIL FILTER LEVEL 2 ALERTS WERE ALSO NOTICED, CHECK LIST WERE ACCOMPLISHED FOR ENGINE FAILURE (FIRE BOTTLE WAS NOT ON CHARGED) & A/C LANDED WITH LEFT ENGINE SHUTDOWN, WITH N O FURTHER PROBLEMS. FINDING: GEARBOX FAILURE, 3 HOLES IN AGB1) AFT FACT OF AGB HOLE 2 X 2 INCH IN BETWEEN IDG & EMPU NEAR TOP OF AGB.2) BOTTOM OF AGB HOLE 2 1/2 X 1/2 INCHES UNDER STARTER. 3) FRONT FACE LARGE HOLE 2 X 3 I LEFT SIDE OF STARTER.ALL VISIBLE GEARS DAMAGED.