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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE D
SEE B
SEE A
UPPER FLEX SHAFT
SEE C
AND TUBING
TUBE NUT
TUBE NUT
LOWER FLEX SHAFT AND TUBING
SUPPORT BLOCK
LOCKING HYDRAULIC ACTUATOR ON THE LEFT SIDEB (RIGHT SIDE IS EQUIVALENT)
A
Thrust Reverser Rotary Flex Shafts And Tubing Figure 401 (Sheet 1)
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LOWER 
FLEXSHAFT 
AND TUBING 
TUBE NUT 
LOWER 
NON-LOCKING 
SYNC LOCK  ACTUATOR 
C 
TUBE NUT 
UPPER 
NON-LOCKING 
ACTUATOR 
CAP 
UPPER FLEXSHAFT 
AND TUBING 
RETRACT HYDRAULIC 
LINE FLEXHOSE 
D 
Thrust Reverser Rotory Flex Shafts and Tubing 
Figure 401 (Sheet 2) 

L51550
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 044-038-N00

 WARNING:_______ DO THE THRUST REVERSER 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.
 (1)  
Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).

 S 014-005-N00

 (2)  
Open the fan cowl panels (AMM 71-11-04/201).

 S 864-006-N00

 (3)  
Operate the thrust reverser manually to move the applicable thrust reverser sleeve rearward about one inch (AMM 78-31-00/201).

 S 684-039-N00
 CAUTION:_______BE PREPARED TO CATCH THE HYDRAULIC FLUID THAT DRAINS. QUICKLY CLEAN THE HYDRAULIC FLUID THAT FALLS. THE HYDRAULIC FLUID CAN CAUSE DAMAGE TO THE ENGINE AND AIRPLANE.
 (4)  Drain the hydraulic fluid from the actuator system on the applicable thrust reverser half.
 (a)  Loosen the coupling for the extend line flex hose at the strut hydraulic connection.
 NOTE: This is done to let air into the actuator system at a
____ high point to drain the hydraulic fluid.
 (b)  
Remove the sync lock from the lower hydraulic actuator (AMM 78-34-13/401).

 (c)  
Remove the extend port cap from the upper non-locking hydraulic actuator. 1) Let the hydraulic fluid drain into the applicable

 container.
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(d)  
Install the extend port cap on the upper non-locking hydraulic actuator.

 (e)  
Tighten the couplings for the extend line flexhose at the hydraulic connections on the strut to 30-35 pound-inches (3.389-3.954 newton-meters).

 S 034-013-N00
 CAUTION: BE CAREFUL WITH THE FLEX SHAFTS AND THE TUBING TO PREVENT
_______ DAMAGE TO THE FLEX SHAFTS. DO NOT LET THE FLEX SHAFT COME OUT OF THE TUBING. DO NOT LET DIRT OR OTHER CONTAMINATION GET ON THE FLEX SHAFTS.
 (5)  Disconnect the tube nuts for the flex shaft from the actuators.
 (a)  Move the tube nuts rearward to get access to the flex shafts.
 S 034-014-N00
 (6)  
Remove the bolts and the clamps which attach the flex shaft tubing to the support structures.
　
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