Builders Guide 53 Fuselage Builders Data Base Link to Boom Assembly Fuselage Boom Assembly Manual Link 29MB Parts List for the Fuselage Boom Assy. P/N Nomenclature    Quantity 53-20 Boom Assy.    1 53-20-10L Boom Side Left    1 53-20-10R Boom Side Right    1 53-20-11L Forward Internal Stiffner …