What was found
PILOT REPORTED ALTERNATOR INOPERABLE AT TAKEOFF POWER. AT IDLE, ALTERNATOR APPEARED TO OPERATE NORMALLY. UPON EXAMINATION, FOUND THE COARSE THREAD INTERNAL WRENCHING BOLTS HOLDING THE ALTERNATOR CASE HALVES WERE LOOSE, WHICH AT HIGH ENGINE RPM, CAUSED THE CASE TO FLOAT ON THE ARMATURE DRIVING THE ALTERNATOR OFF-LINE. SUBMITTER SUGGESTED MANUFACTURER OR OVERHAUL FACILITY SHOULD CONSIDER A HIGHER TORGUE VALUE ON THESE BOLTS TO CURTAIL FURTHER RROBLEMS. THIS WAS THE SECOND OCCURRENCE ON THIS AIRCRAFT WITHIN A 100-HOUR TIME FRAME. (X)