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Wings
DA20-C1 AMM
Page 2
24 Mar 1999 57-10-00 Doc # DA201-C1
Rev. 1
Figure 1: Wing Structure - Shells, Spar, Root Rib and Webs
DA20-C1 AMM
Wings
Doc # DA201-C1
Rev. 0 57-10-00 Page 3
19 Dec 1997
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.
C. Root Rib
The root rib has a forward part and an aft part. Both parts are rigid GFRP moldings with many
layers of glass cloth. Many layers of glass cloth bond both parts of the root rib to the spar.
The forward root rib has a bearing housing for the A-bolt. The A-bolt is a small distance in front
of the spar. The A-bolt transmits lift loads into the fuselage structure.
The aft part of the root rib has a bearing housing for the B-bolt. The B-bolt transmits some lift
loads and lateral loads into the fuselage structure.
D. Aft Inner Web
The Aft Inner Web closes the rear of the wing in front of the flap. It is a rigid GFRP molding.
Three rigid GFRP inserts in the web make mountings for the flap hinge brackets. The web goes
from the root rib to the outer end of the flap.
E. Aft Outer Web
The Aft Outer Web closes the rear of the wing in front of the aileron. It is a rigid GFRP molding.
Three rigid GFRP inserts in the web make mountings for the aileron hinge brackets. The web
goes from the outer end of the flap to the outer end of the aileron.
Wings
DA20-C1 AMM
Page 4
24 Mar 1999 57-10-00 Doc # DA201-C1
Rev. 1
Figure 2: Wing Structure - Ribs
DA20-C1 AMM
Wings
Doc # DA201-C1
Rev. 1 57-10-00 Page 5
24 Mar 1999
F. Flap Control Support Rib
This small rib is close to the root rib. It is a rigid GFRP molding. It has a guide bearing for the
flap control rod.
G. Flap Control Rib
The flap control rib is located half way along the aft inner web. It is a rigid GFRP molding with
an insert. It has the mounting for the flap control bellcrank. It bonds to the aft face of the spar,
the top and bottom shells and the aft inner web. It has a guide bearing for the aileron control
rod.
H. Center Rib
The center rib is located half way along the wing. It is a rigid GFRP molding. It has a guide
bearing for the aileron control rod. It bonds to the aft face of the spar, the top and bottom shells
and the aft inner web.
I. Aileron Control Rib
The aileron control rib is located half way along the aft outer web. It is a rigid GFRP molding
with an insert. It has the mounting for the aileron control bellcrank. It bonds to the aft face of the
spar, the top and bottom shells and the aft outer web.
J. Deleted.
K. Deleted
L. Aileron Mass Balance Rib
The aileron mass balance rib makes a cut-out for the aileron mass balance at the outboard end
of the aft rear web. It is a rigid GFRP molding.
M. Tie-Down Insert
The tie-down insert gives strength to the tie-down point in the bottom shell.
Wings
DA20-C1 AMM
Page 2
19 Dec 1997 57-10-00 Doc # DA201-C1
Rev. 0
Intentionally left blank
DA20-C1 AMM
Wings
Doc # DA201-C1
Rev. 0 57-10-00 Page 201
19 Dec 1997
MAINTENANCE PRACTICES
1. General
These maintenance practices tell you how to remove and install the wings. The procedure is
simple. You need no special tools. Remove/Install the wing using 3 persons.
2. Remove/Install the Wings
A. Equipment
Items Quantity Part Number
Wing trestles 2 Commercial
Wing stands 2 Commercial
B. Remove the Wings
Detail Steps/Work Items Key Items
(1) Remove these items for access:
− Pilot’s seats.
− Access panels below the fuselage for the
control connections.
− Access panels below the wing roots for
the B-bolts.
Refer to Chapter 25.
Refer to Chapter 52-40
Refer to Chapter 52-40
(2) Disconnect the aileron control rods at the
bellcrank on the bulkhead, aft control.
Refer to Chapter 27-10
Through the panels below the fuselage.
(3) Disconnect the flap control rods at the
bellcrank on the bulkhead, aft control.
Refer to Chapter 27-50
Through the panels below the fuselage.
　
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