钻石40飞机维护手册 DA 40 SERIES AMM 4(52)

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Thickened resin bonds all other structural components to the fuselage shells. Many small components bond to the fuselage shells, these include:
) Air inlet and outlet ducts.
) Conduits for electrical wires, antenna cables and fuel pipes.
B. Firewall
The firewall closes the front of the fuselage. It also holds the attachments for the engine mount. It has holes for the different systems that attach to the engine.
The firewall is a rigid GFRP molding. A special adhesive bonds a fire-resistant ceramic blanket to the front face of the firewall. The adhesive also bonds a stainless-steel sheet to the front of the blanket. Components which go through the firewall also hold the stainless-steel sheet and blanket to the GFRP molding.
C. Top Hat Profile
The top hat profile bonds to the inner bottom skin of the fuselage, behind the firewall. It gives strength and stiffness to the front fuselage. It has the mounting for the nose landing gear and channels for fuel pipes.
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Front Main Bulkhead
Front Outer Rib

Figure 2: Fuselage Structure - Center Section
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D. Floor Panel
The floor is a rigid GFRP molding. It bonds to the inner bottom skin of the fuselage shell and the firewall. It goes over the top of the top hat profile. The center part of the floor panel makes the center console.
The rear part of the floor makes the front support for the pilots' seats. It also holds the front of the control stick support brackets. The rudder pedal assembly for each pilot attaches to the floor panel.
E. Center Section
Figure 2 shows the center section. The center sections has the mountings for the wings and the main landing gear. It has a front main bulkhead and it has a rear main bulkhead.
The front main bulkhead is a rigid GFRP box-section molding. It has layers of carbon cloth on the top and bottom faces. The carbon gives cloth gives strength and stiffness to the bulkhead.
The rear main bulkhead has a similar structure. The control bellcrank mounting-bracket is bonded to the rear face of the rear main bulkhead, in the center.
Front, middle and rear outer ribs bond to the outboard ends of the main bulkheads. The ribs are rigid GFRP moldings which make the outer face of the wing stub.
Main landing gear ribs bond to the main bulkheads inboard of the middle outer rib. The main landing gear rib has the outer mounting for the main gear strut.
Front and rear closing ribs bond to the main bulkheads. They are inboard of the main landing gear ribs. The ribs are rigid GFRP moldings. The middle part of the front closing rib has the inner mounting for the main landing gear. The rear channels of the top hat profile bond to the front closing ribs and the front main bulkhead. The rear channels also carry fuel pipes.
A rigid GFRP bottom shell bonds to the lower surface of the center section and makes the bottom surface of the wing stubs and fuselage. Rigid GFRP top shells bond to the top-outer surface of the center section and makes the top surface of the wing stubs.
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Figure 3: Fuselage Structure - Rear Fuselage
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F. Roll Bar
The roll bar is a rigid GFRP molding. Carbon tape gives strength and stiffness to the molding. The roll bar bonds to the inner face of the fuselage shell and around the canopy, window and passenger door cut-outs.
G. Baggage Compartment Frame
The baggage compartment frame is a rigid GFRP molding. It closes the rear of the cockpit and makes a support for the passenger seat (rear seat pan). The frame bonds to the inner fuselage shells and the center section lower shell.
The lower part of the frame has holes for the rudder cables and trim control. It also has a control rod guide for the elevator control rod.
　
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