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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.
AIRCRAFT
Fuselage
DA 40 Series
AMM
Page 4
20 Sep 2007 53-10-00 Doc # 6.02.01
Rev. 5
Front Main Bulkhead
Rear Main Bulkhead
Front Outer Rib
Middle Outer Rib
Rear Outer Rib
Front Closing Rib Rear Closing Rib
Fuel Pipe Channel
Main Landing Gear Rib
Control Bellcrank
Mounting Bracket
Bottom Shell
Top Shell
Rear Web
Figure 2: Fuselage Structure - Center Section
AIRCRAFT
DA 40 Series
AMM
Fuselage
Doc # 6.02.01
Rev. 5 53-10-00 Page 5
20 Sep 2007
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.
AIRCRAFT
Fuselage
DA 40 Series
AMM
Page 6
20 Sep 2007 53-10-00 Doc # 6.02.01
Rev. 5
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% Figure 3: Fuselage Structure - Rear Fuselage
AIRCRAFT
DA 40 Series
AMM
Fuselage
Doc # 6.02.01
Rev. 5 53-10-00 Page 7
20 Sep 2007
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.
H. Ring Frame 1
The ring frame 1 is a rigid GFRP molding. It bonds to the fuselage shells just aft of the baggage
compartment frame. It has holes for the rudder control cables and trim control. It also has a control
rod guide for the elevator control rod.
I. Ring Frame 2
The ring frame 2 is a rigid GFRP molding. It bonds to the fuselage shells aft of ring frame 1. It has
holes for the rudder control cables and trim control. It also has a control rod guide for the elevator
control.
J. Ring Frame 3
The ring frame 3 is a rigid GFRP molding. It bonds to the fuselage shells just forward of the vertical
　
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