What was found
L/H HORIZ. STAB LOWER SKIN @ STA 92.70 REQ'S ACCESS HOLE FOR RIB REPAIRS. GROUNDED - YES. CUT OUT ACCESS HOLE L/H HORZ. STAB LOWER SKIN @ STA 92.70 AND ACCOMPLISHED DOUBLER REPAIR IAW B737-800 SRM 55-10-01-2R-11. THIS IS A CATEGORY B REPAIR. INSPECTION THRESHOLD: 56,000 TOTAL FLIGHT CYCLES, REPEAT INSPECTION INTERVAL: 9,000 FC, INSPECTION METHOD: EXTERNAL (LFEC) INSPECTION REF 737 NDT PART 6, 51-00-26, FIG 1.