VS partial skin rivetting

The 4 x 3.2mm holes above the rivnut in the bottom corner of the skin, along the rear spar channel were enlarged to 4.1mm to take 4mm rivets. The reason for this is that the mis-alignment of the holes in the spar channel and two doublers was up to 0.2mm. This change was discussed and ok'ed by TAF

4mm rivnuts used in place of 3mm rivnuts, holding the skin in place to rib 1 in positions 3 and 6 as per revision 3 plans

The oil-canning encountered in an earlier trial skinning in March was present on the second side. The leading edge of this second side was rivetted starting from the front spar channel. The front ribs were then rivetted. After TC inspection the remainder of this second side will be rivetted working back from the front spar channel to the rear spar channel. It was found previously this is the best method of reducing oil canning in this instance.