What was found
DURIN HFEC INSPECTION PER AD 96-26-04 REFERENCE SB 747-53A2293 FOUND FRAME STATION 280 LEFT CRACKED AT TWO PLACES. EACH CRACK WAS APPROXIATELY .250 INCH LONG, ONE EMINATING FROM AN INSULATION BLANKET STUD MOUNTING HOLE, THE OTHER FROM A GUSSET FASTENER HOLE TO END OF FRAME. REMOVED FRAME AND CRACKED GUSSET ANGLE. FABRICATED REPLACEMENT GUSSET ANGLE PER BOEING DRAWING 65B07942, TREATED AND PRIME PAINTED PER SRM 51-10-02. REPLACED FRAME WITH P/N 65B07942-335 AND GUSSET ANGLE PER SB 747-53A2293 IAW SRM 51-30-02. (M)