What was found
RIGHT HORIZONTAL STAB LOWER SKIN AT BS 92.70 REQ'S ACCESS HOLE FOR SKIN REPAIRS. GROUNDED - YES. REMOVED EXISTING REPAIR, CUT OUT HORIZONTAL SKIN FOR ACCESS, ACCOMPLISHED HFEC OF CUTOUT, 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, THIS IS A CATEGORY B REPAIR, INSPECTION THRESHOLD 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, FIG1.