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 3.  Operation_________
 A.  Functional Description
 (1)  With electrical power on, FLT CONTROL HYD POWER - TAIL VALVE switch positions the shutoff valve according to the selected position. With the switch in SHUTOFF position, the valve is closed; with the switch in NORM position, the valve is open. A guard normally shields the switch in the NORM position. Hydraulic fluid entering the valve assembly is routed to the shutoff valve. When valve is open, hydraulic fluid is ported to rudder and elevator power control packages and the valve indicator light (VALVE CLOSED) is off. When the valve is closed, hydraulic fluid flow to the control packages is stopped and the valve indicator light illuminates (Fig. 2).
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A
747-400
MAINTENANCE MANUAL

 

FLT CONTROL HYD
POWER MODULE

Rudder and Elevator Hydraulic Supply Shutoff Component Location
Figure 1 (Sheet 1)

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747-400 
MAINTENANCE MANUAL 
HORIZONTAL STABILIZER 
JACKSCREW 
SEE  B 
4  SEE  B 
1 
SEE  B 
3  SEE  B 
2 

HYDRAULIC LINES
DC MOTOR OPERATED SHUTOFF VALVE ASSY (4 PLACES TYPICAL)
B
1  DC MOTOR OPERATED SHUTOFF VALVE ASSY, FOR UPPER RUDDER, LEFT OUTBOARD ELEVATOR AND LEFT INBOARD ELEVATOR USING HYDRAULIC SYSTEM NO. 1.
2  DC MOTOR OPERATED SHUTOFF VALVE ASSY, FOR LOWER RUDDER AND LEFT INBOARD ELEVATOR USING HYDRAULIC SYSTEM NO. 2.
3 DC MOTOR OPERATED SHUTOFF VALVE ASSY, FOR UPPER RUDDER AND RIGHT INBOARD ELEVATOR USING HYDRAULIC SYSTEM NO. 3.
4 DC MOTOR OPERATED SHUTOFF VALVE ASSY, FOR LOWER RUDDER, RIGHT OUTBOARD ELEVATOR AND RIGHT INBOARD ELEVATOR USING HYDRAULIC SYSTEM NO. 4.
Rudder and Elevator Hydraulic Supply Shutoff Component Location Figure 1 (Sheet 2)
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747-400
MAINTENANCE MANUAL

28V DC

ELEV RUD SHUTOFF VALVE - P180 (FOUR PLACES)

28V DC MASTER DIM

P180 ELEV RUD VALVE LIGHT (FOUR PLACES)

ELECTRICAL POWER SOURCE AT PANEL P180 DC BUS NO. 1 - HYDRAULIC SYSTEM NO. 1 DC BUS NO. 2 - HYDRAULIC SYSTEM NO. 2 DC BUS NO. 3 - HYDRAULIC SYSTEM NO. 3 ESS TR BUS - HYDRAULIC SYSTEM NO. 4

33-12-00, PILOTS' PANEL LIGHTS - DESCRIPTION AND OPERATION
Rudder and Elevator Hydraulic Supply Shutoff - Simplified Schematic
Figure 2

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747-400 MAINTENANCE MANUAL
 RUDDER AND ELEVATOR HYDRAULIC SHUTOFF VALVE - ADJUSTMENT/TEST
_____________________________________________________________
 1.  General_______
 A.  This procedure gives the steps to do a system test of the hydraulic shutoff valves (referred to as the shutoff valve) for the rudder and elevator. No adjustment or operational test is necessary.
 B.  The list below shows which hydraulic system operates each rudder and elevator:
 (1)  
System No. 1 - Upper Rudder, Left Outboard Elevator and Left Inboard Elevator.

 (2)  
System No. 2 - Lower Rudder and Left Inboard Elevator.

 (3)  
　
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本文鏈接地址：747-400 AMM 飛機(jī)維護(hù)手冊(cè) 飛行操縱 FLIGHT CONTROLS 2(160)