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A GFRP trim tab attaches to the trailing edge of the elevator. The trim tab has six GFRP hinges. The
front half of each hinge bonds to the trailing edge of the elevator. The rear half of each hinge bonds
to the leading edge of the trim tab. Two hinge rods go through the hinges. Lock wires hold the hinge
rods in place.
AIRCRAFT
Stabilizers
DA 40 Series
AMM
Page 4
20 Sep 2007 55-20-00 Doc # 6.02.01
Rev. 5
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Figure 2: Elevator Installation on the Horizontal Stabilizer
Pivot
Trailing Edge Web Pin
Trailing Edge Web
Elevator
Rear Rib
Removable Tip
Bonded
Bush
Bonded
Bush
Elevator Horn
Elevator Horn Rib
Roll
Pin
Balance Weight
AIRCRAFT
DA 40 Series
AMM
Stabilizers
Doc # 6.02.01
Rev. 5 55-20-00 Page 201
20 Sep 2007
Maintenance Practices
1. General
These maintenance practices tell you how to remove and install the elevator and trim tab. Refer to
Sections 27-30 and 27-31 for data on the elevator and trim tab control setting.
2. Remove/Install the Elevator
A. Remove the Elevator
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) Remove the horizontal stabilizer tips.
(4) Remove 2 bolts, nuts and washers which attach
the elevator horn rib to the elevator.
Refer to Figure 2.
(5) Remove the pivot pins from the end bearings:
S Remove the roll pin.
S Pull the pivot pin out of the end bearing.
Hold the elevator.
(6) Pull the elevator aft to release the elevator horn
and hinge assemblies.
(7) Put the elevator in a stand or on a padded
surface.
AIRCRAFT
Stabilizers
DA 40 Series
AMM
Page 202
20 Sep 2007 55-20-00 Doc # 6.02.01
Rev. 5
Trim Tab
Elevator
Lock Wire
Hinge
Rod
Trim Tab Hinge
(6)
Trim Tab Hinge
Trim Tab
Hinge Rod
Hinge Rod
Elevator
Trim Tab
Attaching Bolt
Trim Tab Horn
Cranked Actuating Lever RH
Cranked Actuating Lever LH
Trim Tab Operating Cable
Trim Damper
Figure 3: Trim Tab Installation
AIRCRAFT
DA 40 Series
AMM
Stabilizers
Doc # 6.02.01
Rev. 5 55-20-00 Page 203
20 Sep 2007
B. Install the Elevator
Detail Steps/Work Items Key Items
(1) Put the elevator in position aft of the horizontal
stabilizer:
S Align the elevator with the horn.
S Move the elevator forward over the horn.
S Align the shanks of the hinge assemblies at
mid-span with the bushes in the trailing edge
web of the horizontal stabilizer.
S Push the elevator forward to engage the
shanks in the bushes.
S Align the end bearings with the bushes in the
trailing edge spar of the horizontal stabilizer.
Refer to Figure 2.
(2) Install the pivot pins in the end bearings and lock
the pivot pins in position with a roll pin.
(3) Install the bolts, washers and nuts which attach
the elevator to the elevator horn.
Torque: 6.4 Nm (4.7 ft.lb.). Use new
lock nuts.
(4) Install the 2 ball-end fittings for the trim-tab
operating links.
Under the elevator.
(5) Install the horizontal stabilizer tips.
(6) Install the horizontal stabilizer fairing:
S Install 4 screws.
(7) Do a test for correct range of movement of the
elevator control.
Refer to Section 27-30.
(8) Do a test for correct range of movement of the
elevator trim control.
Refer to Section 27-31.
AIRCRAFT
Stabilizers
DA 40 Series
AMM
Page 204
20 Sep 2007 55-20-00 Doc # 6.02.01
Rev. 5
3. Remove/Install the Elevator Trim Tab
A. Remove the Elevator Trim Tab
Detail Steps/Work Items Key Items
(1) Remove the bolt which attaches the cranked
actuating levers to the trim tab.
Refer to Figure 3.
CAUTION: DO NOT USE FORCE TO REMOVE THE LOCK WIRE FROM THE
TRIM TAB HINGE. YOU CAN DAMAGE THE GFRP HINGE.
(2) Remove the lock wire at the outer hinge on each
side of the trim tab.
(3) Move the hinge rods out of the hinges. Hold the trim tab.
(4) Remove the trim tab from the elevator.
B. Install the Elevator Trim Tab
Detail Steps/Work Items Key Items
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钻石40系列AMM 2(138)
