What was found
(CAN) THIS GEAR SHAFT IS SPLINE INSIDE THE LT INTERMEDIATE GEAR OF THE COMBINING GEARBOX AND IS USED TO DRIVE THE LT HYDRAULIC PUMP. DURING A GROUND RUN FOLLOWING MAINTENANCE THE PILOT NOTICED THE HYD 1 LIGHT REMAINING ON. UPON REMOVAL OF THENR 1 LT HYDRAULIC PUMP, THE END OF THE SHAFT, COUPLING JOINING THE GEAR SHAFT TO THE HYDRAULIC PUMP, CAME OUT WITH THE HYD PUMP. CONTRIBUTING FACTORS: THE HYD PUMP REMOVED APPEARS TO BE SLIGHTLY MORE DIFFICULT TO ROTATE BY HAND THEN A NEW ONE. OBSERVATION: UPON FURTHER INSPECTION BASED ON THE GRAIN OR ANTI-CORROSION TREATMENT, IT APPEARS THE SHAFT HAS TWISTED. THIS PROBLEM OCCURRED ON THE RT SIDE OF THIS ACFT BACK IN NOVEMBER 2013.