What was found
CRACK INDICATION NOTED BETWEEN AT STAB STA 138.70 AND STAB STA 147.90 APROX .5 IN LENGTH. LOCATION IS APOX 5 INCHS FROM CENTERLINE OF FWD ROW OF FASTNER AFT SPAR AND 2 INCH AFT SIDE FROM DOUBLER ON THE STA 147.90 END POINTS OF CRACK ARE IDENTIFIED IN RED MARKER. L/H HORIZONTAL STAB. GROUNDED - YES. REPAIRED L/H HOIZ. STAB LOWER SKIN BETWEEN STAB STA 138.70 AND STAB 147.90 IAW B737-800 SRM 55-10-01-2R-11. TOPCOAT APPLIED IAW B737-800 AMM 51-21-99. REMOVED EXISTING REPAIR ON LOWER SURFACE OF THE LEFT HAND HORIZONTAL STABILIZER IAW B737-800 SRM 51-40-02. REMOVED DAMAGE AND ACCOMPLISHED HFEC INSPECTION OF CUT-OUT AREA IAW B737-NDTM 51-00-00 PART 6 PROC 4 WITH NO CRACK INDICATIONS. FABIRCATED DOUBLER TO INCORPORATE EXISTING REPAIR LOCATION AND INSTALLED CATEGORY B REPAIR IAW B737-800 SRM 55-10-01-2R-11. INSPECTION REQUIREMENTS, 56,000 TOTAL FLIGHT CYCLES.