What was found
CRACK FOUND LEFT HAND HORIZONTAL STABILIZER LOWER SKIN FWD OF REAR SPAR INBOARD OF STAB STA 129.50. APPROX 1 INCH, BOTH ENDS MARKED. GROUNDED - YES. REPAIRED THE CRACK FOUND ON THE LOWER SKIN OF THE L/H HORIZ STAB I/B OF STAB STA 129.50 USING MAT .071 2024-T3 FILLER AND .100 2024-T3 DOUBLER PER B737-800 SRM 55-10-01-2R-11. REPAIR IS CAT "B" AND HAS AN INSPECTION THRESHOLD OF 56,000 TOTAL RIGHT CYCLES AND INTERVAL OF 9,000 FLIGHT CYCLES PER B737-800 SRM 55-10-01-2R-11-.5.