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 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  **ON A/C 051-052, 
R  A. Door Structure 
R 
R  The primary structure has vertical and horizontal edge members, fairings, 
R  longitudinal beams, frames, and an inner and outer skin. These formed and 
R  milled components are made from aluminum alloy and riveted together with 
R  a sealant compound to make a corrosion-resistant cargo door. The sealant 
R  compound between the skin and the edge members makes sure that the 
R  primary structure is pressure-tight. 
R 
R  To prevent corrosion, all components have a surface protection of chromic 
R  acid anodizing plus epoxy primer and a polyurethane top coat. 
R 
R  The lower, milled ends of each door frame have provisions for the 
R  installation of the locking and safety mechanism. An access panel covers 
R  the lower part of the cargo door. 
R 
R  The outer skin has cutouts for the vent door and for the installation of 
R  the three hoisting lugs. 
R 
R  The actuator attachment fitting is attached with screws to the inboard 
R  side of the frames FR25A and FR26A. 
R  For the attachment of the door seal, the related retainers are riveted at 
R  the edge members around the cargo doors. 
R  On the inner skin there are provisions to attach the fire protection 
R  lining with quick-release fasteners. 
R 
R  In the corners of the door beams and door frames, there are gaps to drain 
R  condensed water. Two drain valves are installed on the lowest beam of the 

R 1EFF : ALL 1 52-31-00Page 12 1 1 May 01/05 1 1 1CES 1 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.

 **ON A/C ALL
 B. Door Suspension
 The connection of the cargo door to the fuselage includes the two halves of the piano hinges and two hinge pins. The outer parts of the multi-section piano hinges are made of titanium alloy and the mid parts are made of aluminum alloy. One halve of the piano hinges is attached to the upper edge member of the cargo door with screws. The related, opposite piano hinge halves are riveted on the upper door frame fitting of the fuselage.
 The hinge pins connect the door and the fuselage hinges. The fairings at both ends of the piano hinges hold and safety the hinge pins in their positions.
 C. Lining and Insulation
 To protect the cargo door against fire, a door lining is installed on the inner skin with quick-release fasteners and VELCRO tapes. This lining is in one section and made of prepreg layers. To protect the cargo door against heat and sound, a self-adhesive insulation mat is attached to the door lining. The mat is made of polyethylene foam.
R **ON A/C 001-049, 053-099, 101-149, 151-199, 201-299, 301-399, 401-499,
 D. Proximity Switches
 **ON A/C 001-049, 053-099, 101-105, 151-199, 201-220,
 (Ref. Fig. 003)
R **ON A/C 106-149, 221-299, 301-399, 401-499,
 (Ref. Fig. 003B)
 1EFF : ALL 1 52-31-00Page 13 1 1 Aug 01/05 1 1 1CES 1

 Proximity Switches
 Figure 003

R 1EFF : 001-049, 053-099, 101-105, 151-199, 1 52-31-00Page 14 1201-220, 1May 01/05 1 1 1CES 1

R  Proximity Switches 
R  Figure 003A 
R 1EFF :  051-052,  1  52-31-00 Page 15 
1  1  May 01/05
 1  1
 1CES  1

 

 Proximity Switches Figure 003B 
R 1EFF : 1 1 1CES  106-149, 221-299, 301-399, 401-499,  1 111 52-31-00 Page 16 Aug 01/05

 

R **ON A/C 001-049, 053-099, 101-149, 151-199, 201-299, 301-399, 401-499,
 The proximity switches of the cargo door include a target and a sensor and have a separated electronic system.
　
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