What was found
L/H HORIZONTAL STABILIZER LOWER SKIN HAS A CRACK INDICATION LOCATED BETWEEN STAB STA. 96" TO 98". ALONG REAR SPAR FASTENERS. APPROX. 2" IN LENGTH. (AS MARKED). GROUNDED - YES. EVALUATED L/H HORIZONTAL STAB SKIN SS96 - SS98, CRACK FOUND. REPAIRED AREA IAW B737-800 SRM 55-10-01-2R-11. L/H HORIZONTAL L/E & TIP REMOVED & INSTALLED IAW B737-800 AMM 27-41-21 & AMM 55-10-00. THIS IS A CATEGORY B REPAIR, INSPECTION THRESHOLD: 56,000 FLIGHT CYCLES. EVALUATED HORIZONTAL SKIN IAW 737NTMPT.1 51-00-00 PROC 23.