What was found
DURING C-CHECK, HFEC HAS INDICATED CRACKS TWO EACH STATION 870 JUST BELOW STRINGER 9 MAIN FRAME SPLICE OUTBOARD FLANGE, CRACKS LOCATED IN AFT ROW NR 4 BOTTOM HOLE IN MAIN FRAME AT 4 AND 5 O'CLOCK POSITION APPROX. REAMED HOLE TO NEXT SIZE .0156 AS PER SRM 51-30-2. PARTIAL REPLACEMENT OF TERMINAL FITTING STRINGER 9 TO STRINGER 12 RT SIDE BS 870 AS PER SB 727-53-0194. COMPLIED WITH SB PER FCD 92-727-5311-006.