What was found
DURING CRUSE BOTH HYD LOW-PRESSURE LIGHTS ILLUMINATED. CREW COMPLETED ABNORMAL CHECKLIST FOR CONDITION. CREW DIVERTED FROM ORIGINAL DESTINATION (PWK) TO AIRPORT WITH LONGER RUNWAY (RFD) AS PRECAUTIONARY MEASURE. CREW DECLARED EMERGENCY AS A PRECAUTIONARY MEASURE. CREW REPORTED UNEVENTFUL LANDING. HYD TANK WAS DISCOVERED TO BE EMPTY. HYD FLUID WAS DISCOVERED IN THE LT ENG COWLING AREA AND NONE IN THE RT ENG COWLING. LT HYD PUMP WAS REMOVED AND IT WAS FOUND TO HAVE DRIVE SHAFT SHEARED AND LARGE AMOUNTS OF METAL INSIDE PUMP FITTING AREAS. RT HYD PUMP WAS REMOVED AND IT WAS FOUND THAT THE DRIVE SHAFT DID NOT SHEAR AND THERE WAS A SMALL AMOUNT OF METAL INSIDE PUMP FITTING AREAS.