What was found
DURING REMOVAL OF INTERIOR UPHOLSTERY FOR OTHER MX, FOUND THAT THE LT FORWARD OTBD MLG ATTACHMENT BOLT FITTING THAT IS PART OF THE TUBE FUSELAGE WAS BROKEN COMPLETELY THROUGH ON BOTH SIDES. THIS FITTING IS A BUSHING THAT IS WELDED TO THE FUSELAGE TUBE THAT ATTACHES THE MLG STRUT TO THE ACFT. INSPECTED THE RT FITTING AND FOUND THAT IT WAS CRACKED ALSO. THIS DIFFICULTY SHOWED UP ONLY 15 HOURS AFTER THE LAST 100 HOUR INSPECTION. THIS ACFT IS USED IN FLIGHT TRAINING. THE STRUCTURE IN THIS AREA SEEMS TO BE UNDER DESIGNED. THE MFG IS AWARE OF THIS DIFFICULTY AND HAS ISSUED A REPAIR SCHEME AND A REINFORCEMENT KIT.