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Figure 3: Canopy Locking Mechanism
AIRCRAFT
DA 40 Series
AMM
Doors
Doc # 6.02.01
Rev. 5 52-10-00 Page 7
20 Sep 2007
3. Passenger Door Description and Operation
Figure 4 shows the passenger door installation and locking mechanism.
The passenger door is a CFRP molding with inner and outer frames. The frames bond together with
thickened resin. Each part of the frame has layers of carbon cloth and one layer of glass cloth. Areas
of high stress have extra layers of carbon cloth. Mounting bushes for the handle and locking bolts bond
to the inside of the frame with thickened resin.
The door has a acrylic glass window. A special flexible adhesive bonds the window to the door frame.
A flexible filler seals the small gap between the edge of the window and the frame.
Two hinges attach the door to the top of the fuselage near the center-line. The hinges bolt to the door
frame. The front hinge can be removed from inside of the cabin in an emergency. With the front hinge
removed, the passenger door can be forced open from the top. A gas strut attaches to a bracket at the
rear of the door and to the fuselage. The gas strut holds the door open. A door unlocked warning light
(DOOR or DOORS) on the annunciator panel operates when the door is unlocked.
A handle on the left of the door operates two locking bolts. The locking bolts are at the bottom front
and rear corners of the door.
The handle has two parts. The inner handle is black and has a double lever. The outer handle is red
and attaches to the inner handle with two roll pins. A long connecting rod attaches to the rear of the
double lever. The other end of the long connecting rod attaches to the inside of the rear locking bolt.
A safety lock is fitted to prevent accidental movement of the handle.
You must lift the safety handle before you can operate the black handle from inside the passenger
compartment. To operate the red handle from the outside you must push the button next to the red
handle to lift the inner safety lock.
A short connecting rod attaches to the front of the double lever. The short connecting rod goes to the
front locking bolt. If you pull the canopy handle away from the canopy frame, these things happen:
) The double lever turns to pull the both of the connecting rods.
) The long connecting rod pulls the rear locking bolt forward.
) The short connecting bolt pulls the front locking bolt aft. The aft movement of the locking bolt
operates a micro switch for the door unlocked warning light (DOOR or DOORS) located on the
annunciator panel.
The door can be pushed up and out to open.
With the door fully closed, push the door handle towards the door frame. This engages the locking
bolts in the fuselage holes. The forward locking bolt operates the door unlocked micro switch. When
the handle is flush with the door frame, the door is locked. Push outwards on the bottom of the door
frame to make sure that it is locked.
AIRCRAFT
Doors DA 40 Series
AMM
Page 8
20 Sep 2007 52-10-00 Doc # 6.02.01
Rev. 5
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Figure 4: Passenger Door
AIRCRAFT
DA 40 Series
AMM
Doors
Doc # 6.02.01
Rev. 5 52-10-00 Page 101
20 Sep 2007
Trouble-Shooting
1. General
This table below lists the defects you could have with the canopy and passenger door. If you have the
trouble detailed in the Trouble column, read across to the Possible Cause column. Then do the repair
in the Repair column.
Trouble Possible Cause Repair
Canopy/door is difficult to
move.
Canopy/door frame damaged.
Canopy/door hinges damaged.
Gas spring strut defective.
Replace the canopy/door.
Replace the damaged parts.
Replace the gas spring strut.
Canopy/door handle is difficult
to move.
Locking bolts damaged.
Handle bushes damaged.
Replace the damaged bolt.
Replace the canopy/door.
Canopy handle is difficult to
move.
Teleflex cable defective. Replace the teleflex cable.
Incorrect operation of door
unlocked warning on the
annunciator panel.
Canopy/Door micro-switch
incorrectly adjusted.
Canopy/Door micro-switch
defective.
Defective wiring.
Adjust Canopy/Door micro
switch.
Replace defective micro
　
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