What was found
STA 540, INST. INBD AT THE STR CLIP AT STR 25 LT UNABLE TO LOCATE AND DRILL FASTENER HOLE FOR A YYT 8 FASTENER AND MAINTAIN PROPER E.D. ON THE DSS LOWER 540 FRAME, THIS CONDITION ALSO EXIST AT STA. 560, 520, 580 AND 600. STA 520, 540, 560, 580, 600. JUST INBD OF STRINGER CLIP AT S-25L. A MAJOR REPAIR WAS ACCOMPLISHED DUE TO DISCREPANCY EFFECTING THE PTF MODIFICATION ON STAM WC 118250068DSSR07 AND STAM EA 757-5331-16-F3058, REV- DATED DEC 13,2010 WITH FAA FORM 8110-3 DATED MAR 28, 2011. REF EA F-5310-146518 FOR DTE TRACKING. THIS NON ROUTINE IS FOR TIME TRACKING PURPOSES ONLY. MAJOR REPAIR