What was found
REQ'S ACCESS @ STA 111.10 FOR 4(EA) CRACKS IN RIB, REPAIR 11 REQUIRED. GROUNDED - YES. REMOVED EXISTING REPAIR CUTOUT HORIZONTAL SKIN FOR ACCESS, ACCOMPLISHED HFEC OF CUTOUT, CLEANED EXISTING REPAIR HOLES, ACCOMPLISHED OPEN HOLE HFEC, FABRICATED AND INSTALLED REPAIR PARTS IAW B737-800 SRM 55-10-01-2R-11, B737 NDTM PART 6 51-00-00 PROCESS 23 & 16 BOEING SOPM 20-30-03. THIS IS A CATEGORY B REPAIR, INSPECTION THRESHOLD IS 56.000 TOTAL FLIGHT CYCLES, METHOD IS EXTERNAL LOW FREQUENCY EDDY CURRENT INSPECTION, INTERVAL IS 9,000 FLIGHT CYCLES REFERENCE B737 NDT PART 6 51-00-26, FIG 1.