32-41-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (e)  
The Integrated Display System (IDS) is serviceable (AMM 31-61-00/501).

 E.
Prepare for the Test

 S 495-109
 (1)  Make sure the ground locks are installed in all landing gear (AMM 09-11-00/201).
 S 495-110
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (2)  
Do this task: " Install the Door Locks for all the landing gear" (AMM 32-00-30/201).

 S 495-112

 (3)  
Make sure that wheel chocks are installed at each wheel.

 S 845-113

 (4)  
Release the parking brake.

 S 845-114

 (5)  
Make sure the landing gear handle is in the DN position.

 S 865-115

 (6)  
Supply electrical power (AMM 24-22-00/201).

 S 615-116

 (7)  
Make sure the brake hydraulic accumulator has the correct precharge pressure (AMM 12-15-09/301).

 S 615-117

 (8)  
Make sure the surge accumulators, in the wheel well of each wing gear and in the right body gear, have the correct precharge pressure (AMM 12-15-11/301).

 S 865-100

 (9)  
Make sure these circuit breakers are closed:

 (a)  
P7, Overhead Circuit Breaker Panel
 1) 7F24, LANDING GEAR LEVER LOCK

 (10)
 Pressurize hydraulic systems No. 1 and 4 (AMM 29-11-00/201).

 S 865-102
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 F.  Do the steps that follow to do a test for the gear retract brake:
 S 865-168
 (1)  
Make sure the pressure indication for hydraulic systems No. 1 and 4 on EICAS shows 2900 - 3150 psig.

 S 865-169

 (2)  
Move the landing gear lever to the UP position.

 NOTE: Push the LOCK OVERRIDE button while you move the gear
____
 handle to the UP position.

 (a)  
Monitor the indicator on each brake assembly.

 1)  Make sure that each brake operated to compress the heat stack.

 (b)  
Make sure there is no noise or instability at high frequency.

 S 865-170
 (3)  
Move the landing gear handle to the DN position.

 (a)  
Monitor the indicator on each brake assembly. 1) Make sure that each brake releases.

 G.  
Put the Airplane Back to Its Usual Condition

 S 865-085
 (1)  
Set the parking brake.

 S 865-087

 (2)  
Remove the pressure from hydraulic systems No. 1 and 4 (AMM 29-11-00/201).

 S 865-034

 (3)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 TASK 32-41-00-835-034
 5.  Hydraulic Brake System - Adjustment
___________________________________
 A.  Special Tools and Equipment
 (1)  
G12001-22 - Rig Pin No. 1 (left brake
 pedal bus)

 (2)  
G12001-22 - Rig Pin No. 2 (right brake
 pedal bus)

 (3)  
G12001-15 - Rig Pin No. 3 (left brake
 metering valve control
 quadrant)

 (4)  
G12001-5 - Rig Pin No. 4 (right brake
 metering-valve
 control-quadrant)

 B.  
Standard Tools and Equipment

 (1)  
Cable Tensiometer, 0 to 250 pounds -Commercially Available

 C.  
References

 (1)  
AMM 09-11-00/201, Towing

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
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