14
15
LOWER BIFURCATION
FWD
VIEW IN THE FORWARD DIRECTION
RADIAL SECTION EXAMPLE
(LEFT HALF OF THE THRUST REVERSER)

ENGINE 1 OR 2  ENGINE 3 OR 4 
VANE POSITION  VANE PART NUMBER  VANE POSITION 19  315T4210-1 VANE PART NUMBER 
1  315T4210-1 
2  315T4210-3  20  315T4210-3 
LEFT HALF  4 3  315T4210-3 315T4212-3  21 22  315T4212-3 315T4259-2 1 
OF  5  315T4212-4  315T4259-8 2 
ENGINE  315T4259-10 
7 6  315T4210-3 315T4210-3  23  315T4259-8 315T4259-2 1 
315T4259-10 2 
8  315T4212-3  24  315T4214-4 
9  315T4212-1  25  315T4262-1 
26  315T4262-1 
27  315T4214-1 
10  315T4210-2  28  315T4210-2 
11  315T4210-3  29  315T4210-3 
RIGHT  12  315T4212-4  30  315T4210-3 
HALF OF  13  315T4259-7 315T4259-1 2 1  31 32  315T4212-4 315T4212-3 
ENGINE  315T4259-9 
14  315T4259-7 315T4259-1 1  33 34  315T4210-3 315T4210-3 
315T4259-9 2 
15  315T4214-3  35  315T4212-4 
16  315T4262-1  36  315T4212-2 
17  315T4262-1 
18  315T4214-2 

THRUST REVERSERS WITHOUT SB 78-2123 THRUST REVERSERS WITH SB 78-2123
Positions of the Cascade Vane Segments Figure 401
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 78-31-16
 ALL  ú
 ú  N01  Page 403
 ú  Feb 10/94 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEEA
TORQUE BOX
CASCADE VANE SEGMENT
FWD
AFT MOUNTING RING
TORQUE BOX
THRUST REVERSER MOUNTING BOLT
(THRUST REVERSER SLEEVE REMOVED)
AND WASHER
1 A
CASCADE MOUNTING BOLT
VANE SEGMENT
AND WASHER 1 2
CASCADE
VANE SEGMENT

2
FWD
AFT MOUNTING RING FWD A-A
B-B
1 APPLY THE COMPOUND WHICH PREVENTS CORROSION BELOW THE BOLTHEADS AND ON THE BOLTSHANKS. DO NOT APPLY THE COMPOUND TO THE BOLT THREADS.
2 APPLY THE PRIMER TO THE MATING SURFACE OF THE TORQUE BOX AND AFT MOUNTING RING.
Cascade Vane Segment Installation
Figure 402

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 78-31-16
 ALL  ú ú N01 Page 404 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 024-031-N00
 (2)  
Remove the cascade vane segment.

 S 024-032-N00

 (3)  
For the cascade vane segments which are behind the locking or non-locking hydraulic actuators, do the steps that follow:

 (a)  
Remove the access panel and disconnect the rod end for the hydraulic actuator from the thrust reverser sleeve (AMM 78-31-17/401).

 (b)  
Remove the bolts which attach the adjacent cascade vane segment.

 (c)  
Remove the cascade vane segment.

 (d)  
Remove the bolts which attach the blocked cascade vane segment.

 (e)  
Turn the hydraulic actuator out and move the cascade vane segment into the opening from the adjacent cascade vane segment.

 (f)  
Remove the cascade vane segment from the thrust reverser.

 S 584-041-N00
 CAUTION: DO NOT OPERATE THE ENGINE IN REVERSE THRUST WHEN THE CASCADE
_______ VANE SEGMENTS ARE NOT THERE. IF ALL OF THE CASCADE VANE SEGMENTS ARE NOT THERE, IT CAN CAUSE DAMAGE TO THE THRUST REVERSER STRUCTURE.
 (4)  You cannot operate the engines in reverse thrust for ground maintenance if all of the cascade vane segments are not there.
 S 584-042-N00
 CAUTION: DO NOT LIFT OR MOVE THE THRUST REVERSER HALF WITH MORE THAN SIX
_______ CASCADE VANE SEGMENTS WHICH ARE NOT THERE (YOU MUST HAVE THREE INSTALLED). IF YOU DO NOT HAVE A MINIMUM OF THREE CASCADE VANE SEGMENTS, IT CAN CAUSE DAMAGE TO THE THRUST REVERSER STRUCTURE.
　
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