What was found
(CAN) FUSELAGE FRAME TUBING, SPECIFICALLY LWR LONGERONS, FOUND TO HAVE SERIOUS EXTERNAL CORROSION. DETECTED BY ANOTHER AMO DURING MX, OUR AMO WAS BROUGHT IN TO COMPLETE REPAIRS TO THE TUBING. WHEN RT TUBE WAS CUT TO FACILITATE REPAIRS THERE WAS MOISTURE PRESENT AND SERIOUS INTERNAL CORROSION, BEYOND ECONOMICAL REPAIRS.