21 October 2011

The Forward Gusset 75F9-1 was layout with 7 rivet A5 pitch 30.

The pilot holes to the forward gusset were drilled and debured

The 75F9-1 (FG) was positioned to the top stiffener

The forward gusset and top stiffener were drilled with #40.

Then the upper angle was positioned on the stiffener and forward gusset

The upper angle, top stiffener and forward gusset were drilled with #40

The upper angle, top stiffener and forward gusset were drilled with #20

The firewall top stiffener and upper angle were drilled with #40.

Next the firewall top stiffener and upper angle except hole for 75F9-6 (upper bearing)

and gear gusset 75F9-3 were drilled with A5.

The upper angle along the circle mark of the firewall top stiffener was trimmed

The 75F9-3 (Gear gusset) and top stiffener were drilled with #40 and #20