D.
Access

 (1)  
Location Zone
 454 System 1 - Strut Aft Fairing
 484 System 4 - Strut Aft Fairing

 (2)  
Access Panel
 454AL Trailing Edge Fairing Doors - System 1
 484AL Trailing Edge Fairing Doors - System 4

 E.
Prepare for the leakage check

 S 866-002
 (1)  Supply electrical power (AMM 24-22-00/201).
 S 496-003
 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)  
Make sure that the locks for the landing gear doors are installed (AMM 32-00-30/201).

 S 866-004

 (3)  
Make sure that the person in the flight compartment can speak with the person on the ground.

 S 016-481

 (4)  
Open the doors on the trailing edge fairing for engines No. 1 and No. 4 (AMM 54-62-00/201).

 S 486-005

 (5)  
If a hydraulic service cart is used as the pressure source, connect the hydraulic service cart (AMM 29-11-00/201):

 (a)  
Connect the cart to the No. 1 and No. 4 hydraulic systems. Install a flow meter in the pressure line between the cart and the system No. 1 ground-service disconnect on the pressure module.

 (b)  
If the cart does not have a flowmeter, install a flowmeter at the cart pressure line outlet.

 (c)  
Connect the return line on the hydraulic service cart to the No. 1 and No. 4 return modules (AMM 29-11-00/201).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400 MAINTENANCE MANUAL
 S 486-006
 (6)  
If the system demand pump is used as the pressure source, release the pressure in hydraulic system No. 1 (AMM 29-11-00/201).

 (a)  
Install a flowmeter in the pressure line on the No. 1 demand pump between the pump and the ground service disconnect on the pressure module.

 (b)  
Make sure there is a minimum of 2000 pounds (900 kg) of fuel in the No. 1 and No. 4 main fuel tanks.

 NOTE: The fuel weight values are calculated with a fuel
____
 density of 6.7 pounds per gallon.

 S 866-482
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
_______ FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (7)  
Make sure that the inboard and outboard trailing edge flaps are fully retracted.

 (a)  
If it is necessary, do this task: "Trailing Edge Flaps Retraction with Electrical Power" (AMM 27-51-00/201).

 S 866-008
 (8)  
Put the ALTN FLAPS ARM switch on the P2 first officer's panel in the off position.

 S 866-010

 (9)  
Put the A/P ENGAGE switches (L, C, and R) on the control panel for the AFCS mode in the off position.

 S 866-011

 (10)
 Put the system No. 1 WING FLT CONTROL SHUTOFF switch on the P461 overhead maintenance panel in the ON position.

 S 866-012

 (11)
 Put the system No. 1 TAIL FLT CONTROL SHUTOFF switch on the P461 overhead maintenance panel in the ON position.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 866-013
 (12)
 Make sure that the selector handle for the landing gear on the P2 first officer's panel is in the OFF position.

 S 866-014

 (13)
 Put the system No. 1 HYD PUMPS ENG switch in the ON position (P5 Overhead Panel).

 F.
　
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