Wing Structure; Description - Diamond DA20-C1 Maintenance Manual

DA20-C1 AMM
1. General
The DA20-C1 aircraft has composite wings. The main spar has carbon fiber spar-caps. The wing shells
have GFRP skins and a rigid foam core. Rigid GFRP moldings give strength to the structure. Some also
hold control levers or bearings.
Refer to the following Chapters:
- Chapter 57-50 for the data about the flaps
- Chapter 57-60 for the data about the ailerons
- Chapter 27-00 for data about the control systems.
2.

Description

Figure 1 shows the wing structure. Bonding paste (thickened resin) bonds the wing components to each
other. The wing has the following main parts:
A. Wing Shells
Each wing has top and bottom shells. Each shell has GFRP skins with a rigid foam core. The skins
have many layers of glass cloth. Some areas have more layers to give more strength. In most
cases, the fibers in the cloth lie at ±45° to the lateral axis.
The wing has an anti-vortex tip. The aft end of the wing tip has a mounting for the position light
assembly.
The bottom shell of both wings has holes for access panels below the flap and aileron bellcranks.
The bottom shell has a hole for an access panel below the B-bolt. This gives access to the B-bolt
for removing the wings.
The outer leading edge of both shells in the left wing has a cut-out for the landing and taxi lamps.
A stall strip bonds to the leading edge of both wings at approximately 2/3 span.
B. Spar
The wing has an I-beam spar. Carbon fiber rovings make the spar caps. The number of rovings
decreases from the root to the tip.
The spar has a shear web. The web has GFRP skins and a rigid foam core. Glass cloth fillets
attach the spar caps to the shear web.
The inboard end of the spar is a stump. Many layers of glass cloth transmit the wing bending loads
into the spar stump. The inboard end of the spar stump goes into the spar bridge in the fuselage.
The inboard end has a large metal bush for the wing main pin. The main pin transmits the wing
bending loads into the spar bridge.
DA201-C1
Rev 16

WING STRUCTURE

57-10-00
Wings
Page 1
30 Oct 09