What was found
DURING MAINTENANCE FOR UNRELATED ALTERNATOR PROBLEM, FOUND TOP ALTERNATOR BOLT (PN 401 424) WORN APPROX 20 PERCENT THROUGH. HAVE SEEN THIS NUMEROUS TIMES BEFORE AND BELIEVE THIS TO BE CAUSED BY THE FRONT AND/OR REAR BUSHING(S) (PN 753 380) BECOMING LOOSE AND VIBRATING CAUSING THIS WEAR. BUSHING LOOSENESS COULD BE ATTRIBUTED TO IMPROPER INSTALLATION OF ALT IE, IMPROPER INSTALLATION OF WASHERS FOR SPACING. SUGGEST CLOSE INSP OF ALT INSTALL AND ATTACH HARDWARE AT NEXT INSP.