Several of my main wing ribs have a marking inscribed on the inside of the forward flange. It looks something like "1\ W \ 018 W". The engraving seems to have been done manually. Vans have no idea what it is and now I wonder if someone else might have a clue to what it means.
https://picasaweb.google.com/lh/photo/yijBF_n6Ed-bA5GRmDTkU3sbvak3oyD1iw0RNCD0HK0?feat=directlink
Thanks,
https://picasaweb.google.com/lh/photo/yijBF_n6Ed-bA5GRmDTkU3sbvak3oyD1iw0RNCD0HK0?feat=directlink
Thanks,