Cut out approximately 1" of the lower flange of the F-721B Aft Canopy Deck directly below the aft pilot hole location. Made this cut on both side of the fuselage. This will provide access for fitting the C-668 spacers and make it a lot easier to install the bolts and nuts used to hold the Wd-641 Roll Bar on the aft canopy deck. Deburr all the edges for the access hole. This was a very time consuming and difficult job but will pay back later.
