What was found
RIGHT HORIZONTAL STABILIZER LOWER SKIN HAS A CRACK INDICATION AT STAB STA. 129.5 LOCATED APPROX. 16" FROM THE AFT SPAR. FOUND. TO BE APPROX. .875" LONG. AS MARKED. GROUNDED - YES. INSTALLED DOUBLER AND INCORPORTATED 2 EXISTING DOUBLERS IN AREA I.A.W. B737-800 SRM 55-10-01-2R-11 REPAIR 11. THIS IS A CLASS "B" REPAIR WITH AN INSPECTION THRESHOLD OF 56000 TOTAL FLIGHT CYCLES AND AN INTERVAL OF 9000 FLIGHT CYCLES. INSPECTION METHOD IS DETAILED VISUAL INSPECTION ON THE EXTERNAL PART [1] DOUBLER AND LFEC INSPECTION UNDER EXTERNAL PART [1] DOUBLER AND THE SPAR CHORD UNDER THE EXTERNAL PART [1] DOUBLER PER 737-800 SRM 55-10-01-2R-11 TABLE 204