What was found
MAIN CABIN BS 280 BULKHEAD, LBL12, WL79.50, HAD SIGNS OF CORROSION. REMOVED AND REPLACED SECTION LOWER WEB REPAIR ON MAIN CABIN BS 280 BULKHEAD LBL12 AND WL79.50 IAW SRM 53-00-00, AMM 20-70-00, SRM 51-42-06, 51-42-21, 51-42-13, 51-25-16, REO 670-53-11-594 REV-A.