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the rear spar and the trailing edge web.
The rear box rib has sides with bends and a top face which joins the sides. It closes the sides of the
large cut-out in the bottom shell. The aft part has 3 holes on each side for the anchor bracket for the
trim-tab mechanism.
Two trailing edge webs close the trailing edges of the top and bottom shells. The outboard end of each
web is a 'J' shape which goes round the outboard balance weight of the elevator. It extends aft at the
outer side to close the elevator cut-out. The webs also holds the hinges for the elevator. The webs
bond to the top and bottom shells and the rear and rear 'box' ribs with resin.
A rigid GFRP fairing goes around the joint between the horizontal stabilizer and the vertical stabilizer.
Four screws attach the fairing to the vertical stabilizer.
AIRCRAFT
Stabilizers
DA 40 Series
AMM
Page 2
20 Sep 2007 55-10-00 Doc # 6.02.01
Rev. 5
Bottom Shell
Top Shell
Front Mounting Bracket
Rear Mounting Bracket
Horizontal Stabilizer Tip
Front Spar
Front Rib
Center Rib
Rear 'Box' Rib
Rear Spar
Rear Rib
12
Trailing Edge Web
Figure 1: Horizontal Stabilizer Structure
AIRCRAFT
DA 40 Series
AMM
Stabilizers
Doc # 6.02.01
Rev. 5 55-10-00 Page 201
20 Sep 2007
Maintenance Practices
1. General
These maintenance practices tell you how to remove and install the horizontal stabilizer.
2. Remove/Install the Horizontal Stabilizer
A. Remove the Horizontal Stabilizer
Note: Use 2 persons to remove/install the horizontal stabilizer.
Detail Steps/Work Items Key Items
(1) Remove the horizontal stabilizer fairing.
S Remove 4 screws.
(2) Release the 2 ball-end fittings from the trim-tab
operating links.
Under the elevator.
(3) Release the trim-tab mechanism from its
mounting bracket.
Refer to Section 27-31.
(4) Move the trim-tab mechanism forward through
the hole in the vertical stabilizer web, clear of the
mounting bracket.
(5) Remove the bolt which connects the elevator
vertical push rod to the elevator horn.
(6) Remove the 8 bolts which attach the horizontal
stabilizer to the front and rear mounting brackets.
Hold the horizontal stabilizer.
(7) Disconnect the VOR antenna.
(8) Lift the horizontal stabilizer clear of the airplane.
AIRCRAFT
Stabilizers
DA 40 Series
AMM
Page 202
20 Sep 2007 55-10-00 Doc # 6.02.01
Rev. 5
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% Figure 2: Horizontal Stabilizer Installation
12
12
12
Vertical Stabilizer
Front Web
Horizontal Stabilizer
Front Spar
Horizontal Stabilizer
Rear Spar
Front
Mounting Bracket
Rear
Mounting Bracket
Elevator Actuating Lever
Collar Bush
Distance Bush
Large Washer
Elevator Push Rod
Balance Weight
Elevator Lever Rib
Earthing Strip
AIRCRAFT
DA 40 Series
AMM
Stabilizers
Doc # 6.02.01
Rev. 5 55-10-00 Page 203
20 Sep 2007
B. Install the Horizontal Stabilizer
Detail Steps/Work Items Key Items
(1) Examine the horizontal stabilizer attachments.
Look specially for:
S Corrosion or wear of the bolts.
S Distortion of the mounting brackets
S Cracks in the mounting brackets.
S Damage to the mounting holes.
(2) Put the horizontal stabilizer in position on the
vertical stabilizer.
Hold the horizontal stabilizer.
(3) Connect the VOR antenna.
(4) Install the 8 bolts which attach the horizontal
stabilizer to the front and rear mounting brackets.
Use new self-locking nuts.
(5) Install the bolt which connects the elevator
vertical push rod to the elevator horn.
Use a new self-locking nut.
Torque: 1.7 Nm (1.2 ft.lb)
(6) Move the trim-tab mechanism aft through the
hole in the vertical stabilizer web, through the
mounting bracket for the trim mechanism.
(7) Attach the trim-tab mechanism to its mounting
bracket.
S Install 2 bolts.
Use a new self-locking nut.
(8) Connect the 2 ball-end fittings to the trim-tab
operating links.
Under the elevator.
(9) Do a test for correct, full and free movement of
the elevator control. If necessary, adjust the
elevator control.
Refer to Section 27-30.
　
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