Escape Slide Installation
Figure 002
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1 1
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Slide/Raft Installation
Figure 002A
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the emergency escape-slide release-mechanism (Ref. 52-11-22).
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the door fittings (Ref. 52-11-31).
(2) Aft Passenger Crew/Door The main components of the aft passenger/crew door are:
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the door structure (Ref. 52-13-11),
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the door suspension (Ref. 52-13-12),
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the door seal (Ref 52-13-18),
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the door damper and emergency-operation cylinder (Ref. 52-13-14),
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the door locking mechanism (Ref. 52-13-21).
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the emergency escape-slide release-mechanism (Ref. 52-13-22).
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the door fittings (Ref. 52-13-31).
2. Description
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A. Structure (Ref. Fig. 003) The main structural components of the passenger/crew doors are the horizontal longerons, vertical frame segments, outer skin, edge members and inner skin which are riveted together. The adjustable stop fittings, and their corresponding fittings on the door fuselage frame, transfer the loads resulting from cabin pressure to the aircraft structure. The door seal consists of a rubber extrusion with spaced pressurization holes. It is installed on the inner side of the outer skin at the periphery of the door. When the door is closed, the seal is pressed against the fuselage door frame and inflated by cabin air pressure to form a pressure tight seal.
B. Door Mechanism
**ON A/C 001-002,
(Ref. Fig. 004)
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(Ref. Fig. 004A)
**ON A/C ALL
Two mechanims inside the door structure control the locking of the door and the evacuation system.
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Structure of the Passenger/Crew Doors Figure 003
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Control Mechanism of the Passenger/Crew Doors
Figure 004
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Control Mechanism of the Passenger/Crew Doors
Figure 004A
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(1) Door locking mechanism
**ON A/C 001-002,
(Ref. Fig. 005)
R **ON A/C 003-049, 051-099, 101-149, 151-199, 201-299, 301-399, 401-499,
(Ref. Fig. 005A)
**ON A/C ALL
The door is locked by a hook. The hook is connected by a rod and bellcrank to the locking shaft, which is locked in an overcentered position. An arm on the locking shaft forms the visual locking indicator. A spring rod maintains the overcentered position. In addition, a safety pin is provided to prevent any movement of the door which would result from a double mechanical failure in the locking mechanism and the lifting mechanism. The lifting lever (lower connection link) lifts the door. The door moves upwards until it is clear of the stop fittings and then moves outwards. A torsion bar spring compensates for the weight of the door. The door inner and outer control handles operate the door locking mechanism. The shafts of these handles are coupled so that the outer control handle does not move when the door is lifted with the inner control handle. The gearbox is connected by rods to the locking shaft and the lifting lever. A lowering shaft acts via a rod on a locking hook and locks the gearbox with the door open. It is not possible to lower the door when it is in the open position out of its frame.
(2) Door Damper and Emergency-Operation Cylinder
**ON A/C 001-002,
(Ref. Fig. 006)
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Locking Mechanism of the Passenger/Crew Door
Figure 005
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Locking Mechanism of the Passenger/Crew Doors
Figure 005A
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Door-Damper and Emergency-Operation Cylinder
Figure 006
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(Ref. Fig. 006A)
**ON A/C ALL
The damper and emergency-operation cylinder, installed on the support arm, damps door movement during opening/closing especially under abnormal conditions (heavy wind loads). Damping is effected by hydraulic fluid which pass through a restrictor as the operating rod extends or retracts. The damper and emergency-operation cylinder is also an emergency actuator and assists the opening of the door in emergency condition. This is effected by a gas cylinder installed on the body of the damper and emergency-operation cylinder. The gas which operates the cylinder is released when the door upward movement causes the pivoting stop lever to actuate the gas release lever, if the escape slide release system is armed. The damping function is automatic at the end of the door travel (door open). It is possible to close the door again after a complete emergency opening.
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