What was found
(CAN) ALTERNATOR REMOVED FROM A/C ENGINE FOR INST ON A NEW ENGINE FOR THIS A/C. NO PILOT RPTED LOSS OF CHARGE BEFORE ENGINE WAS STOPPED FOR HIS TBO. SMALL PIECES OF METAL & RUBBER FELL OFF THE ACCESSORIES CASE UPON REMOVAL OF ALTNR. LOOKING CLOSELY TO ALTNR SPLINE GEAR & DRIVE SHAFT, EVIDENCE OF DAMAGES WERE FOUND. RETAINING CUP & RUBBER BUSHINGS WERE COMPLETELY SHREDED. SPLINE GEAR LUGS WERE ALSO BROKEN OFF & THIS PARTICULAR ALTNR, ROTOR SHAFT SHEARED. RETAINING CUP & RUBBER BUSHINGS ARE MOUNTED BETWEEN SPLINE GEAR DRIING SHAFT & THEROTOR SHAFTOF ALTERNATOR. THIS INST IS DESIGNED TO SHEAR OFF & PREVENT DAMAGES TO ENGINE IN CASE WHERE AN ALTNR SHAFT