What was found
LEFT HORIZONTAL STABILIZER LOWER SKIN IS CRACKED AT STAB STA 147.90, APPROX 8" FWD OF DRAIN HOLE.DOT 262A003. GROUNDED - YES. REPAIRED CRACK ON LEFT HORIZONTAL STABILIZER LOWER SKIN AT STAB STA 147.90, APPROX 8" FWD OF DRAIN HOLE IAW B737-800 SRM 55-10-01-2R-11, PG 3, STEP 4. THIS IS A CAT B REPAIR WITH AN INSPECTION THRESHOLD OF 56,000 TOTAL FLIGHT CYCLES WITH AN INSPECTION INTERVAL OF 9,000 FLIGHT CYCLES. AIRCRAFT TOTAL FLIGHT CYCLES AT TIME OF REPAIR IS 14,880, PER B737-800, SRM 55-10-01-2R-11, PG 7, STEP 5.