Cleco forward fuselage bulkhead subassemblies to the fuselage bottom skin. Break apart and cleco the systems backets to the bottom skin. Attach the firewall bulkhead assembly tot he bottom skin. Mark with a sharpie the part of the forward fuselage assembly that has to be cut away for the gear leg hole. Match drill all the common holes.
28-6 Complete per plans
28-7, Steps 1 & 2
Cleco the forward cabin floor panels into forward fuselage subassembly.