AFT SMALL CARGO DOOR SYSTEM -LIFT LOCK CAM -FUNCTIONAL DESCRIPTION
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AFT SMALL CARGO DOOR SYSTEM -HINGE PDU AND MANUAL DRIVE FLEXIBLE SHAFT
Purpose The gearbox gets torque from the manual drive flexible shaft
when you open or close the door manually. The hinge power drive unit (PDU) supplies torque that opens and closes the door.
The manual drive flexible shaft lets you manually supply torque to open and close the door.
Location
The hinge PDU and the manual drive flexible shaft mount to airplane structure above the door. The input socket for the shaft is on the external skin, forward of the door.
Physical Description
The hinge PDU has these components:
*
Connection to the manual drive flexible shaft
*
Connections to two drive torque tubes.
*
A gear box
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A three phase, 115/200v ac, 400 Hz motor with a brake.
The manual drive flexible shaft is a teleflex cable that connects the manual drive socket to the hinge PDU.
Functional Description
The motor supplies torque through the gearbox and torque tubes to rotary actuators.
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AFT SMALL CARGO DOOR SYSTEM -HINGE PDU AND MANUAL DRIVE FLEXIBLE SHAFT
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AFT SMALL CARGO DOOR SYSTEM -ROTARY ACTUATOR
Purpose
The rotary actuators transmit torque from the hinge PDU to the hinge arms.
Location
The rotary actuators mount to airplane structure above the door.
Physical Description
The actuators are compound, planetary differential gearboxes.
Functional Description
Torque tubes transmit torque from the hinge PDUs to the rotary actuators. The actuators transmit the torque to the hinge arms. The gears in the actuators will not let the weight of the door backdrive the actuators.
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AFT SMALL CARGO DOOR SYSTEM -ROTARY ACTUATOR
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AFT SMALL CARGO DOOR SYSTEM -HINGE ARM -INTRODUCTION
Purpose
The hinge arms connect the door to the rotary actuators, and move the door between the lifted (unlatched) and full open positions.
Location
The hinge arms are on the upper, forward and aft corners of the door.
Physical Description
The hinge arm assembly includes:
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Upper lift link
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Hinge link
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Scissor arm
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Lift pin
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Lift pin link (2)
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Lower lift link
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Adjustment rod
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Hinge arm
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Programming rod (2).
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AFT SMALL CARGO DOOR SYSTEM -HINGE ARM -INTRODUCTION
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AFT SMALL CARGO DOOR SYSTEM -HINGE ARM -FUNCTIONAL DESCRIPTION
Functional Description 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：777 AMM 飞机维护手册 Doors 舱门(29)
