What was found
L/H WING DRAINAGE CHANNEL AT THE BOTTOM OF THE FWD SPAR IS CORRODED AT OFSS449. GROUNDED - YES. ACCOMPLISHED BLENDOUT REPAIR TO LOWER SKIN AND SPLICE REPAIR TO L/E LOWER STRAP AS REQUIRED IAW ALASKA EA#800-57EA-24934 DATED 12/16/2022. REMOVED AND REINSTALLED #3 S; AT TP F/P/,/ OAW ASA B737-800 AMM 27-81-21.REMOVED AND REINSTALLED #3 SLAT ACTUATOR TO FOM IAW ASA B737-800 AMM 27-81-41. REMOVED AND REINSTALLED ANTI ICE DUCT TO FOM IAW ASA B737-800 AMM 30-11-31.ALL LEAK AND OPS CHECKS ARE GOOD. REPAIR ACCOMPLISHED PER BOEING SR 3-5464507525 AS A CATEGORY B REPAIR WITH STAGE 1 APPROVAL.