What was found
THE SKIN SUPPORTING THE COPILOTS IB SEAT RAIL WAS FOUND CRACKED. THE CRACK WAS APPROX 2.5 INCH LONG AND WAS PERPENDICULAR TO THE SEAT RAIL. THE CRACK WAS LOCATED AT THE AFT END OF THE SEAT RAIL. DURING THE REPAIR, WE FOUND THE STIFFENER UNDERNEATH THE FLOOR, PN 04102362 CRACKED IN THE WEB. THIS STIFFENER WAS REPLACED. THE AC HAD 9500 HOURS TT AND HAS BEEN USED EXCLUSIVELY AS A TRAINER. THE CRACK WAS FOUND DURING A 100 HOUR INSPECTION. (K)