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2. Remove/Install the Elevator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
3. Remove/Install the Elevator Trim Tab . . . . . . . . . . . . . . . . . . . . . . 204
4. Repair Data for the Elevator Shells . . . . . . . . . . . . . . . . . . . . . . . . 206
AIRCRAFT
Stabilizers
DA 40 Series
AMM
Page 2
20 Sep 2007 55-CONTENTS Doc # 6.02.01
Rev. 5
Section 55-30
Lower Fin
1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Maintenance Practices
1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
2. Remove/Install the Lower Fin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Section 55-40
Rudder
1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Maintenance Practices
1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
2. Remove/Install the Rudder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
3. Repair Data for the Rudder Shells . . . . . . . . . . . . . . . . . . . . . . . . 204
AIRCRAFT
DA 40 Series
AMM
Stabilizers
Doc # 6.02.01
Rev. 5 55-00-00 Page 1
20 Sep 2007
Horizontal Stabilizer
Rudder
Elevator
Trim Tab
Lower Fin
CHAPTER 55
STABILIZERS
1. General
The DA 40 has the usual stabilizers. The vertical stabilizer is part of the fuselage. The aft part of the
left and right fuselage shells make the left and right shells of the vertical stabilizer. See Section 53-10
for data on the fuselage structure.
The horizontal stabilizer has top and bottom shells. Each shell has GFRP skins. The horizontal
stabilizer has a front spar and a rear spar. Both spars have mounting brackets. Three pairs of ribs give
strength to the center area. Two trailing edge webs hold the hinges for the elevator.
The elevator has top and bottom shells. Each shell has GFRP skins with a rigid foam core. The bottom
shell also makes the leading edge spar. The hinges attach to the bottom shell. A large horn with the
mass balance weight attaches to the bottom shell at the center. The trailing edge carries a trim tab.
The lower fin is a GFRP molding. Bolts attach the lower fin to the bottom of the fuselage.
The rudder has left and right shells. Each shell has GFRP skins with a rigid foam core. The shells bond
together at a flange. The hinges attach to the top face of the rudder and a flat face near the bottom of
the leading edge. The horn near the top makes the rudder mass balance.
Figure 1: Stabilizers
AIRCRAFT
Stabilizers
DA 40 Series
AMM
Page 2
20 Sep 2007 55-00-00 Doc # 6.02.01
Rev. 5
Intentionally left blank
AIRCRAFT
DA 40 Series
AMM
Stabilizers
Doc # 6.02.01
Rev. 5 55-10-00 Page 1
20 Sep 2007
Section 55-10
Horizontal Stabilizer
1. General
The DA 40 has the usual horizontal stabilizer. The horizontal stabilizer attaches to the top of the
vertical stabilizer. The elevator attaches to the trailing edge of the horizontal stabilizer. See Section
55-20 for data about the elevator structure.
2. Description
Figure 1 shows the horizontal stabilizer structure.
The horizontal stabilizer has top and bottom shells. Each shell has GFRP skins. The top shell has no
cut-outs. The bottom shell has a large cut-out at the rear for the elevator horn and mass balance. It
also has two smaller holes forward and aft of the front spar.
The horizontal stabilizer has 2 spars. The spars have GFRP skins with rigid GFRP inserts at the main
mounting points. They also have top and bottom caps. The ends of the front spar turn back to join the
aft spar at mid span. The rear spar goes almost to the tip of the horizontal stabilizer. The spars bond
to the top and bottom shells with resin.
Each spar has four holes for a mounting bracket. You can get access to the attachment bolts from
below. The mounting brackets go down through the cut-outs in the bottom shell. Four more holes in
the bottom part of each mounting bracket attach to the vertical stabilizer front web.
Three pairs of ribs give strength to the center area on each side of the access holes. All are rigid
GFRP moldings. They bond to the other components with resin. The rear 'box' ribs make a box round
the large cut-out in the bottom skin. A short rear rib at mid-span gives strength to the area between
　
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