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E. Flap and Aileron Control Ribs
Each wing has two flap and one aileron control rib. The ribs are GFRP moldings. Each rib has a bend with a solid insert. The insert gives extra strength where the control bellcrank attaches. The ribs bond to the top and bottom shells, the aft face of the rear spar and the rear web.
F. Rear Web
Each wing has a rear web. The web closes the trailing edge of the wing. The web bonds to the top and bottom shells. It also bonds to the rear faces of the rear root rib, the flap control ribs and the aileron control rib. The rear web has extra layers where the flap and aileron hinges attach. Rivets hold anchor-nut plates to the forward face of the rear web where the hinges attach.
G. Wing End Rib
Each wing has an end rib. The end rib is a GFRP molding. The end rib has eight anchor-nuts which attach the wing tip. It also has a threaded strong-point for a tie-down ring.
H. Wing Tip
The wing tip is a GFRP molding with top and bottom shells. The wing tip holds the external lights.
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Maintenance Practices
1. General
These maintenance practices tell you how to remove and install the wings. They also tell you how to remove and install the wing tips and other small components.
2. Remove/Install the Wings
A. Equipment
Item  Quantity  Part Number 
Padded wing trestles.  4  Commercial. 
Main bolt removal tool.  1  -
Wing stand (not essential).  1 per wing  Commercial. 

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B. Remove the Wings
Use this procedure to remove the left wing or the right wing. Where a part of the procedure applies to only one wing it will tell you so.
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Detail Steps/Work Items  Key Items/References 
WARNING: MAKE SURE THAT THE AREA AROUND THE FLAPS IS CLEAR OF PERSONS AND EQUIPMENT BEFORE YOU LOWER THE FLAPS. IF NOT, THE FLAPS CAN INJURE PERSONS OR BE DAMAGED BY EQUIPMENT. 
(1)  Lower the flaps. 
(2)  Disconnect the battery.  Refer to Section 24-31 (Lycoming version) or 24-34 (TAE version). 
(3)  Defuel the airplane.  Refer to Section 12-10. 
(4)  Remove these items for access: S The left/right pilots’ seats S Main landing gear access panel. S Center section rear access panel. S Inboard fuel tank access panel.  As necessary. Refer to Section 25-10. 

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DA 40 Series

Detail Steps/Work Items  Key Items/References 
(5)  Put trestles under both wing tips.  Under the end rib. 
(6)  Disconnect the flap push-rod: S Remove the nut, washer and bolt.  At the wing root. Through the center section rear panel. 
(7)  Disconnect the aileron push-rod: S Remove the nut, washer and bolt.  At the wing root. Through the center section rear panel. 
(8)  Disconnect the electrical connector in the wing harness.  Left wing: connector P2400, under the pilot's seat. Right wing: connector P2401, under the co-pilot's seat. 
(9)  Disconnect these items under the left pilot’s seat: S The Pitot hose. S The static hose. S The stall warning hose.  For left wing only. The hose is 8 mm (5/16 in) diameter. (Green color). The hose is 8 mm (5/16 in) diameter. (Purple color). The hose is 10 mm (3/8 in) diameter. (Transparent). 
WARNING: DO NOT GET FUEL ON YOU. FUEL CAN CAUSE DISEASE. WARNING: DO NOT ALLOW FIRE NEAR FUEL. FUEL BURNS AND CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT. 
(10)  Disconnect the fuel hose(s) in the stub wing.  Put a container to catch a small quantity of fuel. Remove spilt fuel. 
　
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