Work on W12-01L Left Rear Spar. Drill #40 and cleco W13-01L Left Hand Attach Plate, W13-02L Root Rib Attach Angle. Drill #40 2 outside holes on W12-01L for W16-01 thru W16-05, -06 x 7 Ribs and cleco. Drill inner holes on same. Fitting W16-07, -08 Gussett to W16-01 thru -04 Rib. Notch front corners of W16-01 thru -04 Rib.
