(4)  
System No. 4 - Lower Rudder, Right Outboard Elevator and Right Inboard Elevator.

 TASK 27-23-00-715-001
 2.  Rudder and Elevator Hydraulic Shutoff Valve Test________________________________________________
 A.  References
 (1)  
06-09-05/201, Body Section 48 Access Doors and Panels

 (2)  
09-11-00/201, Towing

 (3)  
24-22-00/201, Manual Control

 (4)  
29-11-00/201, Main Hydraulic Supply System

 B.  
Access

 (1)  
Location Zone
 311 Area Aft of Pressure Bulkhead, LH
 312 Area Aft of Pressure Bulkhead, RH

 (2)  
Access Panel 312A Horizontal Stabilizer Jackscrew Access Door

 C.  
Procedure

 S 495-002
 WARNING:_______MAKE SURE THE NOSE LANDING GEAR IS POINTED FORWARD. IF THE TIRES ARE NOT PARALLEL WITH THE AIRPLANE, THEY CAN TURN QUICKLY WHEN YOU REMOVE THE TOW PIN. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  Install the TOW PIN at the steering metering valve for the nose landing gear (Ref 09-11-00/201).
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 27-23-00
 ALL  ú ú 01 Page 501 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

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

MOTOR
ELECTRICAL
CONNECTORS

HYDRAULIC LINES 
SHUTOFF VALVE (EXAMPLE) 
A 
1  AND LEFT INBOARD ELEVATORS THAT USE HYDRAULIC SHUTOFF VALVE FOR THE UPPER RUDDER, LEFT OUTBOARD SYSTEM NO. 1. 
2  INBOARD ELEVATOR THAT USE HYDRAULIC SYSTEM NO. 2. SHUTOFF VALVE FOR THE LOWER RUDDER AND LEFT 
3  INBOARD ELEVATOR THAT USE HYDRAULIC SYSTEM NO. 3. SHUTOFF VALVE FOR THE UPPER RUDDER AND RIGHT 
4  AND RIGHT INBOARD ELEVATORS THAT USE SHUTOFF VALVE FOR THE LOWER RUDDER, RIGHT OUTBOARD HYDRAULIC SYSTEM NO. 4. Shutoff Valve Test Figure 501

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 27-23-00
 ALL  ú ú 01 Page 502 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (2)  S 015-003Open the access door, 312A, for the stabilizer jackscrew compartment (Ref 06-09-05/201).
 (3)  S 865-004Supply electrical power (Ref 24-22-00/201).
 (4)  S 865-006Find the switches for the FLT CONTROL HYD POWER on the pilot's overhead maintenance panel, P461. (a) Set the TAIL switch for the applicable system to the NORM position. 1) Make sure the VALVE CLOSED light is off.
 (5)  S 215-030Make sure the manual indicator lever on the shutoff valve is in the valve open position.
 S 865-009

 CAUTION: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. THE AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (6)  
Supply hydraulic power to the applicable hydraulic system (Ref 29-11-00/201).

 (a)  
System No. 1 - Upper Rudder, Left Outboard Elevator, Left Inboard Elevator

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

 (c)  
System No. 3 - Upper Rudder, and Right Inboard Elevator

 (d)  
System No. 4 - Lower Rudder, Right Inboard Elevator, and Right Outboard Elevator

 S 715-031
 CAUTION:_______MOVE THE RUDDER PEDALS SMOOTHLY AND SLOWLY. THE MINIMUM TIME FOR A FULL CYCLE IS 8 SECONDS. IF YOU MOVE THE RUDDER PPEDALS TOO FAST IT CAN CAUSE DAMAGE TO THE POWER CONTROL PACKAGE.
 (7)  Operate the rudder pedals and the control column until the rudders and the elevators move smoothly through their full travel.
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