One signal is sent to the ECAM system so that the MASTER CAUTION LIGHT in the cockpit comes on. At the same time it gives a single chime warning for the flight crew. The other signal causes the white indicator light SLIDE ARMED to come on. During the movement of the inboard handle from the LOCKED to the UNLOCKED position, the subsequent occurs at the same time:
-
The cover mechanism lowers the guide arm cover of the door lining so that the guide arms come free.
-
The drift pin retracts and the locking hook disengages from the upper lock fitting of the door frame. This releases the spring-loaded switch mechanism so that its target is not aligned with the related proximity switch. It sends a signal to the ECAM system to warn the flight crew that the door is unlocked.
-
The indication window shows the red color UNLOCKED.
-
The lifting shaft turns and lifts then the door until its guide rollers are clear of the fuselage guide fitting. The support arm holds then the door in balance.
When the door is lifted, the lowered operation lever prevents the operation of the gas release lever. Thus, the door damper and emergency operation cylinder does not open the lifted door. To open the door, the operator must push against the assist andle so that the door moves outboard and forward. When the door moves forward, the guide arms keep the door parallel to the fuselage. When the opening is free, the door buffer at the support arm touches the fuselage and stops the door movement. The latch of the door stay mechanism then engages with the latch fitting mounted on the door frame. Thus, the door is locked in its fully opened position.
C. Opening of the Emergency Exit Door from the Outer Side
NOTE : In the subsequent description, the emergency exit door is referred
____
to as door.
To get access to the outboard handle, the operator must push the handle flap inboard. This operates the control mechanism so that the outboard handle engages with the external control shaft. When the outboard handle is pulled away from the door to release the locking mechanism, the subsequent occurs:
-
The transmission shaft turns and operates the arm/disarm unit so that the intermediate shaft turns. This causes the release shaft to turn and its release lever does not engage with the actuation lever on the door frame. This prevents the operation of the escape slide-control mechanism during the door is opened from the outer side.
-
The external control shaft turns and operates the internal control shaft so that the locking shaft turns. Thus, the drift pin retracts and the locking hook disengages from the upper lock fittting.
1EFF : 301-399, 1 52-22-00Page 31 1 1 May 01/04 1 1 1CES 1
-The lifting shaft turns and lifts then the door until its guide rollers are clear of the guide fittings. The support arm holds then the door in balance.
When the door lifts, the lowered operation lever prevents an operation of the gas release lever. Thus, the door damper and the emergency operation cylinder do not open the lifted door.
To open the door, the operator must pull on the outboard handle so that the door moves outboard and forward. When the door moves forward, the guide arms keep the door parallel to the fuselage. When the opening is free, the door buffer of the door arm touches the fuselage and stops the door movement. The latch of the door stay mechanism engages then with the latch fitting mounted on the door frame. Thus, the door is locked in its fully open position.
D. Closing of the Emergency Exit Door
NOTE : In the subsequent description the emergency exit door is referred
____
to as door.
To close the door, the operator must push the release button in the grip fitting on the support arm. This operates the spring-loaded linkage of the door stay mechanism so that its latch disengages from the latch fitting. The operator must pull on the assist handle or the outboard handle to move the door to the closing position. The guide rollers are in position so that they engage with the guide fittings when the door lowers. The roller of the door detent shaft touches the related frame fitting and operates the shaft assy. The safety shaft turns and moves the safety catch so that it disengages from the blocking hook. This releases the blocking of the lifting mechanism and the operator can pull down the inboard or outboard handle. When one of these handles is moved toin the LOCKED position, the locking shaft turnes and the subsequent occurs:
-
The other handle automatically moves down and is safetied in its
locking position.
-
The lifting shaft turns and lowers the door until the guide rollers touch the integral stops of the guide fittings.
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(50)
