What was found
AT APPROX 900 FT DURING CLIMBOUT FROM KSAT, RT ENGINE FAILED AND AUTOFEATHERED. ENGINE TORQUE, RPM AND PROP RPM ALL DROPPED. SECURED ENGINE PER THE CHECKLIST, DECLARED AN EMERGENCY AND RETURNED TO KSAT. MX DISCOVERED OIL RESIDUE IN THE EXHAUST AND ON THE 2ND STAGE TURBINE BLADES. NO CHIP DETECTOR LIGHT WAS REPORTED, OR NOTED BY MAINTENANCE. NO DEBRIS FOUND IN THE ENGINE OIL FILTER OR ON THE MAGNETIC CHIP DETECTOR. OIL LEVEL WAS DOWN BY 1 QT. EXCESSIVE OIL WAS FOUND IN THE ACCESSORY GEAR BOX. THE ENGINE IS BEING REPLACED. INVESTIGATION OF REMOVED ENGINE FOUND A CRACKED P3 AIR LINE. THE CRACKED LINE WAS THE PROBABLE CAUSE OF THE LOSS OF POWER AND ENGINE IN-FLIGHT SHUT DOWN.