曝光臺 注意防騙 網曝天貓店富美金盛家居專營店坑蒙拐騙欺詐消費者

Lower Latch Adjustment
The latch beam, split line, and aft cowl hoop tie latches are all on the lower part of the T/R. You measure the force necessary to close these latches with a spring scale. If the force is not in the limits, you adjust the adjustment nut on the latch hook until the closing force is in the limits.
Load Share Latch Adjustment
The load share latches are on the aft, upper part of the T/R. You measure the force necessary to close these latches with a spring scale. If the force is not in the limits, you adjust the adjustment nut on the latch eye-bolt until the closing force is in the limits.
EFFECTIVITY BEJ ALL  71-11-00 
Page 24 
D633W101-BEJ  Sep 05/2002 

 

ENGINE COWLING -THRUST REVERSER LATCH ADJUSTMENT -TRAINING INFORMATION POINTS

EFFECTIVITY BEJ ALL  71-11-00 
Page 25 
D633W101-BEJ  Sep 05/2002 

PW4000 SERIES ENGINES

777 AIRCRAFT MAINTENANCE MANUAL

THIS PAGE IS INTENTIONALLY LEFT BLANK

71-12-00

Page 1 D633W101-BEJ Sep 05/2002

POWERED DOOR OPENING SYSTEM (PDOS) -INTRODUCTION

The powered door opening system (PDOS) opens and closes the fan cowls and the thrust reversers. You can also use the PDOS to manually open and close the fan cowls and the thrust reversers.
The PDOS uses hydraulic power to open the fan cowls and the thrust reversers. Gravity closes the fan cowls and the thrust reversers.
You operate the PDOS with the actuation and control switches. Each fan cowl and each thrust reverser half has an actuation and control switch.
EFFECTIVITY BEJ ALL  71-12-00 
Page 2 
D633W101-BEJ  Sep 05/2002 

 

POWERED DOOR OPENING SYSTEM (PDOS) -INTRODUCTION

EFFECTIVITY BEJ ALL  71-12-00 
Page 3 
D633W101-BEJ  Sep 05/2002 

PDOS -GENERAL DESCRIPTION

The powered door opening system (PDOS) uses hydraulic power to open the fan cowls and the thrust reversers (T/R). It uses gravity to close them.
The PDOS has these components:
*
Actuation and control switches

*
Pump/power pack

*
Actuators.

Actuation And Control Switches
Each fan cowl and each T/R half has an actuation and control switch. Each switch has an up button and a down button. The up button opens the cowl and the down button closes the cowl. The switches permit 28v dc power to go to the pump/power pack solenoids.
Pump/Power Pack
The pump/power pack supplies hydraulic pressure to the actuators. It has a hydraulic reservoir and an electric hydraulic pump. The pump/power pack gets 115v ac power from the ground handling bus. The hydraulic fluid goes to an actuator when the related solenoid energizes.
The PDOS pump/power pack has a manual drive lug. When there is no airplane power, you can operate the solenoid valves and the manual drive lug to open the fan cowls and T/Rs. You operate only the solenoid valves to let gravity close the fan cowls and T/Rs.
　
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 動力裝置 Power Plant PW 777 AIRCRAFT MAINTENANCE MANUAL(20)