What was found
DURING M2 AND WHILE INSPECTING PER 5316-01052-05B THE HORIZONTAL STIFFENER OF LATERAL WINDOW FR4 RHS WAS FOUND COMPLETELY REMOVED DUE TO PREVIOUS REWORK PER THIS ER/A ORIGINAL REVISION. PER SECTION IV OF 573692-14 REV B, ACCOMPLISH SECTION IV REPETITIVE INSPECTION WITHIN EVERY 2,200 FC FROM SECTION III (17JUN26). ASSOCIATED ER/A 31-573692 ADDED FOR AC 3169. (LP: 1651940, AIRCRAFT WAS GROUNDED)