When the control switch is in the NORM position, the valve opens. When the valve is fully open, the related amber light VALVE CLOSED does not show. The advisory message FLT CONTROL VALVE does not show on the EICAS display.
When the control switch is in the SHUTOFF position, the valve closes when the airplane is on the ground. As the valve leaves the open position, the amber VALVE CLOSED light shows on the P61 panel. The advisory message FLT CONTROL VALVE shows on the EICAS display.
Training Information Point
Ground maintenance personnel use the flight control SOVs to isolate certain portions of the flight controls during troubleshooting and other maintenance work.
Only the center flight control SOVs use an air/ground signal. This signal prevents closure of the valves when the airplane is in the air.
The left and right flight control SOVs can be closed in the air or on the ground.
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PFCS -FLIGHT CONTROL SHUTOFF VALVES -FUNCTIONAL DESCRIPTION
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PFCS -FLIGHT CONTROL SHUTOFF VALVES -DISTRIBUTION/CONTROL
General
The graphic shows the wing and tail SOVs for the three hydraulic systems. It also shows the PFCS control surfaces that each valve controls.
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PFCS -FLIGHT CONTROL SHUTOFF VALVES -DISTRIBUTION/CONTROL
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PFCS -INDICATIONS -FLIGHT CONTROLS SYNOPTIC DISPLAY
General
The flight controls synoptic display gives the flight crew a graphical overview of the flight control system. The display includes individual positions and failures for each flight control surface.
Normal Conditions
Under normal conditions the indications are white. The pointer on the labeled scales shows the position of the control surfaces.
The spoiler position indicators fill white from the bottom up.
The stabilizer and the rudder trim indicators show the stabilizer and rudder position in degrees. The direction of rudder trim is next to the indicator.
Defective Conditions
When a surface does not operate, a defective condition indicator replaces the scale and pointer or the moving band. The color of this indicator is amber.
Unknown Conditions
When the status of a control surface is unknown, the pointer does not show on the scale. In the case of the spoilers, there is no moving band.
Other System Information
At the bottom of the synoptic display, individual indicators show the condition of:
*
The hydraulic power supply systems
*
The PFCS mode of operation
*
The ACE operation.
The PFCS mode condition shows in green when in normal mode. In secondary or direct mode, the indication shows in amber.
The condition of the hydraulic power supply systems or the ACEs shows only when there is a failure of one of the systems or ACE. The indicator for the failed system or ACE is amber. The others are green.
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PFCS -INDICATIONS -FLIGHT CONTROLS SYNOPTIC DISPLAY
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777 AIRCRAFT MAINTENANCE MANUAL
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PFCS -INDICATIONS -MAINTENANCE PAGE -CONTROLS AND VARIABLES
General
There are three PFCS maintenance pages. Page one contains data for the control inputs and variables.
Maintenance personnel use the maintenance pages to do maintenance functions such as rigging or do a check of the discrete inputs and outputs of the PFCS components.
These are the three different display modes:
*
Real time mode
*
Manual event mode
*
Auto event mode.
The word MANUAL or AUTO at the top of the page identifies the manual event or the auto event page. The message that caused the auto event is at the bottom left of the page. The time of the event is at the bottom right.
Variables and Controls
The top of the page shows:
*
Roll rate in degrees per second
*
Yaw rate in degrees per second
*
Altitude in feet
*
Roll angle in degrees
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本文链接地址：777 AMM 飞机维护手册 飞行操纵 Flight Controls 1(14)
