What was found
(CAN) DURING SCHEDULED INSPECTION, REPLACING THE HORIZONTAL STAB AFT ATTACHMENT POINTS. WE REMOVED THE BOLTS THAT ATTACH TO THE CASTING TO GAIN ACCESS, THREE OF THE 12 BOLTS WOULD JUST SPIN IN PLACE.AFTER REMOVING THESE BOLTS WE FOUND THAT THE NUTS (INSERTS) WERE STRIPPED. WE COULD ONLY SUSPECT THAT THEYWERE OVERTORQED IN PAST. ALL INSERTS WERE INSPECTED AND ALL SUSPECT ONES REPLACED WITH NEW. ALL NEW BOLTS, LT AND RT INSTALLED.