The proximity switches of the door warning system (circuit WV) monitor the closed and locked condition of the cargo door. They send a signal to the Electronic Centralized Aircraft Monitoring (ECAM) system when a cargo door is not locked. Then the master caution lights in the cockpit come on and the data is shown on the DOOR page of the ECAM display.
The external indications which show that a cargo door is not correctly locked and latched are:
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the vent door stays in open position,
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the locking handle stays away from the outer contour of the cargo door,
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the red mark of each safety cam is in view through the indication windows.
**ON A/C ALL
4. Component Description
_____________________
R **ON A/C 001-049, 053-099, 101-149, 151-199, 201-299, 301-399, 401-499,
A. Door Structure
The primary structure has vertical and horizontal edge members, fairings, longitudinal beams, frames, and an inner and outer skin. These formed and milled components are made from aluminum alloy and are riveted together with a sealant compound to make a corrosion-resistant cargo door. The sealant compound between the skin and the edge members makes sure that the primary structure is pressure-tight.
To prevent corrosion, all components have a surface protection of chromic acid anodizing plus epoxy primer and a polyurethane top coat.
The lower, milled ends of each door frame have provisions for the installation of the locking and latching mechanism. An access panel covers the lower part of the cargo door.
The outer skin has cutouts for the vent door and for the installation of the three hoisting lugs.
1EFF : ALL 1 52-32-00Page 16 1 1 Aug 01/05 1 1 1CES 1 The primary structure has provisions for the outboard installation of a fairing which improves the aerodynamics of the rear section.
**ON A/C 051-052,
A. Door Structure
The primary structure has vertical and horizontal edge members, fairings, longitudinal beams, frames, and an inner and outer skin. These formed and milled components are made from aluminum alloy and riveted together with a sealant compound to make a corrosion-resistant cargo door. The sealant compound between the skin and the edge members makes sure that the primary structure is pressure-tight.
To prevent corrosion, all components have a surface protection of chromic acid anodizing plus epoxy primer and a polyurethane top coat.
The lower, milled ends of each door frame have provisions for the installation of the locking and safety mechanism. An access panel covers the lower part of the cargo door.
The outer skin has cutouts for the vent door and for the installation of the three hoisting lugs.
The primary structure has provisions for the outboard installation of a fairing which improves the aerodynamics of the rear section.
**ON A/C 001-049, 053-099, 101-149, 201-299, 301-399,
The attachment fittings of the door actuators are part of the door frames
FR53A and FR54A.
For the attachment of the door seal, the related retainers are riveted at
the edge members around the cargo doors.
On the inner skin there are provisions to attach the door lining with
quick-release fasteners.
In the corners of the door beams and door frames, there are gaps to drain
condensed water. Two drain valves are installed on the lowest beam of the
pressure-tight structure and drain this water via drain hoses to the
outside. Some drain holes are added in the critical areas of the internal
structure which is painted with a water repellent agent.
Additonal access cover are in the outer skin of the cargo door to get
access to the drift pin asssembly from the outer side.
R 1EFF : ALL 1 52-32-00Page 17 1 1 Aug 01/05 1 1 1CES 1
**ON A/C 051-052,
The actuator attachment fitting is attached with screws to the inboard side of the frames FR53A and FR54A. For the attachment of the door seal, the related retainers are riveted at the edge members around the cargo door. On the inner skin there are provisions to attach the fire protection lining with quick-release fasteners.
In the corners of the door beams and door frames, there are gaps to drain condensed water. Two drain valves are installed on the lowest beam of the pressure-tight structure and drain this water over board. Some drain holes are added in the critical areas of the internal structure which is painted with a water repellent agent.
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