S 424-040-N00

 (3)  
Connect the hydraulic extend lines(5) to the DCV (2).

 S 424-041-N00

 (4)  
Connect the hydraulic retract lines (6) to the DCV (2).

 S 424-042-N00

 (5)  
Connect the hydraulic pressure line to the DCV.

 S 424-043-N00

 (6)  
Connect the hydraulic return line to the DCV.

 S 434-044-N00

 (7)
Connect the electrical connector to the aft face of the DCV (2).

 (8)
Make sure the bonding resistance is not more than 0.0025 ohms.

 S 444-046-N00

 (9)  
Do the activation procedure for the thrust reverser
 (AMM 78-31-00/201).

 S 764-045-N00
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 864-047-N00
 (10)
 Remove the DO-NOT-OPERATE tags from the thrust levers.

 S 714-048-N00

 (11)
 Do this task:  Thrust Reverser Operation - Deploy/Stow (Power Method) (AMM 78-31-00/201).

 S 044-049-N00
 WARNING: DO THE DEACTIVATION PROCEDURE TO PREVENT THE OPERATION OF THE
_______ THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 (12)
 Do the deactivation procedure for the thrust reverser for ground maintenance (AMM 78-31-00/201).

 S 794-050-N00

 (13)
 Examine the directional control valve and related hydraulic tubes for hydraulic fluid leaks.

 G.
Put the Airplane Back to Its Usual Condition.

 S 214-051-N00
 CAUTION: MAKE SURE YOU REMOVE ALL TOOLS AND UNWANTED MATERIAL IN THE
_______ STRUT. IF YOU DO NOT DO THIS, DAMAGE TO THE ENGINE CAN OCCUR.
 (1)  
Make sure you remove all tools and unwanted material from the strut before you install the forward fairing panel(s).

 S 414-052-N00

 (2)  
Install the forward fairing panel(s).

 S 444-053-N00

 (3)  
Do the activation procedure for the thrust reverser
 (AMM 78-31-00/201).

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S 444-054-N00
 (4)  Do the activation procedure for the Speed Brake Control System (AMM 27-62-00/501).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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THRUST REVERSER FLOW CONTROL TEE - REMOVAL/INSTALLATION
_______________________________________________________
 1.  General
_______
 A.  This procedure has four tasks.
 (1)
Remove the extend flow control tee.

 (2)
Remove the retract flow control tee.

 (3)
Install the extend flow control tee.

 (4)
Install the retract flow control tee.

 B.  
SB 747-78A2128 changed the thrust reverser flow control tees. The flow control tees without the one-way valve restrictor cannot prevent the build up of back pressure to the deploy side of the locking actuator if more than one actuator has leaking internal seals. The new flow control tee configuration is in Thrust Reverser Flow Control Tee - Airplanes with one-way valve restrictors AMM 78-34-02/401.

 C.  
The flow control tee for the thrust reverser is attached to the directional control valve, which is on the strut. You must remove the strut forward fairings for access.

 TASK 78-34-02-004-001-N01
 2.  Remove the Thrust Reverser Flow Control Tee
　
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