What was found
CRACK FOUND ON THE LOWER SKIN OF THE LEFT-HAND HORIZONTAL STABILIZER AFT OF THE FWD SPAR, INBOARD OF STAB STA 138.70. APPROX 1 INCH LONG, BOTH ENDS MARKED. GROUNDED - YES. REPAIRED THE CRACK FOUND ON THE LOWER SKIN OF THE L/H HORIZ STAB I/B OF STAB STA 138.70 USING MAT .071 2024-T3 FILLER AND .100 2024-T3 DOUBLER PER B737-800 SRM 55-10-01-2R-11.REPAIR IS A CAT "B" AND HAD ANINSPECTION THRESHOLD OF 56,000 TOTAL FLIGHT CYCLES AND AN INTERVAL OF 9,000 FLIGHT CYCLES PER B737-800 SRM 55-10-01-2R-11.5