What was found
DURING C-17 CHECK 6 EACH .0625 INCH CRACKS WERE FOUND ON SKIN AT LOWER ROW OF FASTENER HOLES STR 4 LT, BS 500D+4, BS 500D+13, BS 522, BS 523, BS 525, AND BS 527. MAINTENANCE CUT OUT CRACKED SKIN AT STR 4 LT BS 500D+4, BS 500D+13, AND FROM BS 518 TO BS 526; PERFORMED A HFEC INSPECTION OF CUTOUTS TO VERIFY NO CRACKS EXIST; FABRICATED 2 EACH REPAIR DOUBLERS, 3 EACH FILLERS, AND 2 EACH INTERNAL DOUBLERS; INSTALLED REPAIR FROM BS 500D TO BS 530 IAW B737-300 SRM 51-40-02 PG 38 FIG 8 AND SRM 53-00-01 PG 362 FIG 228.