Structure of the 73" Emergency Exit Door
Figure 005
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Structure of the 60" Emergency Exit Doors
Figure 006
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To prevent the corrosion of the primary door structure, all components have a surface protection and are installed with sealing compound. The surface protection of the structure components is chromic acid anodizing plus epoxy primer and polyurethane top coat. On the inner side of the door there is a water repellant agent.
B. Door Seal
R The door seal is an extruded rubber seal profile with equally-spaced pressurization holes. Retainers attached with bolts and nuts around the inner edge of the outer skin hold the door seal in the position. When the door is closed, the door seal touches with the sealing section of the fuselage door frame. When the cabin is pressurized, the door seal inflates and makes the door pressure-tight.
C. Lining and Insulation
R Differently formed insulation packets and panels are installed in the interspaces of the primary structure for sound and thermal protection. They are attached with VELCRO tapes on the inner face of the outer skin. The insulation panels are made of polyethylene foam. They are only installed in the area where the movable components of the door mechanism are located.
The insulation packets are made of glasswool blankets which are covered with a wrapped foil. An additional insulation mat made of polyethylene foam is attached with VELCRO tapes on the inner skin of the door.
The door lining which is in several sections covers the inner side of the door. It has different cut-outs for the subsequent components:
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the interior control handle of the locking mechanism,
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the door window and the warning indicator lights,
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the LOCKING/UNLOCKING indicator,
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the DISARMED/ARMED indicator.
D. Door Suspension
(Ref. Fig. 007)
The primary components of the door suspension are:
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the support arm,
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the upper and lower guide arms,
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the adjustable door buffer,
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the door stay mechanism.
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Door Suspension
Figure 007
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The support arm and the guide arms hold the door in balance and keep it parallel to the fuselage when it moves. The support arm is a cast alloy box section with integral connection forks. It is linked to the fuselage hinge fittings and to the link lever of the door locking mechanism to connect the door with the fuselage. The guide arms are installed between the fuselage attachment fitting and the guide fitting mounted on the door. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址:A320飞机维护手册 AMM DOORS 舱门3(45)