What was found
PUSHROD WAS CORRODED FROM INSIDE OUT, ABOUT MID-WAY DOWN LENGTH OF PUSHROD. CAUSED BY LACK OF CORROSION PROTECTION ON INSIDE OF PUSHROD. FOUND WHEN PUSHROD WAS REMOVED FROM C/W NEW NDT INSPECTION REQUIREMENT. ON VISUAL INSPECTION, FOUND .1250 INCH DIAMETER HOLE ON PUSHROD. HOLE WAS NOT VISIBLE FROM INSPECTING PANEL OR AILERON GAP. SUBMITTER RECOMMENDS AFTER C/W NDT INSPECTION, PUSHROD SHOULD BE FILLED WITH LPS-3 OR OTHER CORROSION INHIBITOR, AND DETAILED INSPECTION DURING WING INSPECTION.