*
Handle box

*
Gas spring

*
Vent door crank

*
Door open switch

*
Handle cam

*
Lift crank.

The door open switch is on the door handle mechanism.
Functional Description
The external handle connects to the outer shaft. The internal handle connects to the inner shaft. The outer shaft fits over the inner shaft.
The external handle return spring holds the outer shaft over the inner shaft. When you pull outboard on the external handle, the outer and inner shafts lock together.
The inner shaft goes through the handle box which provides a bearing surface for the handle. The inner shaft connects to the handle cam. A lift drive crank and a latch drive rod connect the handle cam to the latch shaft. When you turn either handle, you move the latch shaft.
Pressure in the gas spring pushes down on the handle cam so the door handles are held in the full close position. Movement of either handle toward open compresses the gas in the spring. When the handle is past the center of movement, the compressed gas helps move the handle to full open.
A cable connects the disarm crank on the external handle to the mode select mechanism. When you pull the external handle out, you move the disarm crank. It pulls on the cable which moves the mode select mechanism to the disarm mode.
When the door is open, the handle cam will not transmit back drive forces from the latch shaft to the handles.
EFFECTIVITY BEJ ALL  52-11-00 
Page 22 
D633W101-BEJ  Sep 05/2002 

PASSENGER ENTRY DOOR SYSTEM -HANDLE MECHANISM AND MECHANICAL SWITCHES

EFFECTIVITY BEJ ALL  52-11-00 
Page 23 
D633W101-BEJ  Jan 05/2002 

PASSENGER ENTRY DOOR SYSTEM -LATCH MECHANISM -INTRODUCTION

Purpose
The latch mechanism does these functions:
*
Unlatches and latches the door

*
Lifts and lowers the door as it opens and closes so the door stops can move past the cutout stops.

Physical Description
The mechanism has these components:
*
Door locked proximity sensor

*
Latch track (2)

*
Latch crank (2)

*
A latch drive rod

BEJ 008-999; BEJ 001-007 POST SB 777-52-0031
* A latch crank interlock
BEJ ALL
*
Torque tube (2)

*
A secondary lift.

Functional Description -Cam, Crank, and Torque Tube
The program cam moves the lift crank which pulls the latch drive rod up. This turns the torque tubes.
EFFECTIVITY BEJ ALL  52-11-00 
Page 24 
D633W101-BEJ  May 05/2003 

PASSENGER ENTRY DOOR SYSTEM -LATCH MECHANISM -INTRODUCTION

EFFECTIVITY BEJ 008-999; BEJ 001-007 POST SB 777-52-0031  52-11-00 
Page 25 
D633W101-BEJ  May 05/2003 

PASSENGER ENTRY DOOR SYSTEM -LATCH MECHANISM -INTRODUCTION

EFFECTIVITY BEJ 001-007 PRE SB 777-52-0031  52-11-00 
Page 26 
D633W101-BEJ  May 05/2003 

777 AIRCRAFT MAINTENANCE MANUAL

THIS PAGE IS INTENTIONALLY LEFT BLANK

52-11-00

Page 27 D633W101-BEJ May 05/2003

PASSENGER ENTRY DOOR SYSTEM -LATCH MECHANISM -LATCH CRANK FUNCTION

Functional Description
The torque tubes turn the latch cranks. The latch crank rollers push down on the latch tracks when opening. This moves the door inboard and lifts the door. During closing they perform the opposite motions.
BEJ 008-999; BEJ 001-007 POST SB 777-52-0031
The aft latch has the latch crank interlock. In the door closed and door up positions, the latch track pushes the latch crank interlock outboard against its spring.
As the door opens, the latch cranks move out of the latch tracks. The spring on the latch crank interlock turns the interlock to a position over the aft latch crank. The latch crank cannot move back to the closed position. You cannot move the handle when the door is open.
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：777 AMM 飛機維護手冊 Doors 艙門(9)