Abstract: A turbofan jet engine includes an outer fan duct, an inner fan duct, fluid-conveying ancillaries located outside the outer fan duct, fluid-conveying ancillaries located inside the inner fan duct. At least one removable modular arm forming a connection for ancillaries is arranged between the outer fan duct and the inner fan duct. The removable arm provides a connection of ancillaries outside the outer fan duct to ancillaries inside the inner fan duct.

Abstract: Turbomachine fan duct comprising two coaxial cylindrical walls (60, 68), these being an internal wall and an external wall, respectively, the internal wall (68) consisting of a framework (70) to which panels (72) are removably attached, and the external wall (60) consisting of a single support structure (62) comprising openings (64) closed by removable panels (66), the openings (64) in the external wall having dimensions that allow the panels (72) of the internal wall to pass and allow these panels to be fitted onto and removed from the framework (70) of the internal wall.

Abstract: The present invention concerns a turbofan jet engine comprising an outer fan duct, an inner fan duct, fluid-conveying ancillaries located outside the outer fan duct, fluid-conveying ancillaries located inside the inner fan duct, characterized by the fact that at least one removable modular arm forming a connection for ancillaries is arranged between the outer fan duct and the inner fan duct. With the invention, the connection of ancillaries outside the outer fan duct to ancillaries inside the inner fan duct is achieved simply by means of a removable arm that is easy to mount and dismount.