(6)  
78-31-00/201, Thrust Reverser System

 B.  Access
 (1)  
Location Zones
 511 Leading edge to front spar (Left)
 521 Leading edge to front spar (Left)
 522 Slat No. 4 (Left)
 611 Leading edge to front spar (Right)
 621 Leading edge to front spar (Right)
 622 Slat No. 7 (Right)

 (2)  
Access Panels
 511KT
 521AB
 521UBX
 522JL
 522BL
 611KT
 621AB
 621UBX
 622JR
 622BR

 C.  Prepare for Removal
 S 864-002
 (1)  
Supply electrical power (Ref 24-22-00).

 S 864-003

 (2)  
Put the leading edge slats in the fully extended position. Use the electric or hydraulic drive systems (Ref 27-81-00).

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A

757
MAINTENANCE MANUAL

SEEA
FWD
INBD
FLEXIBLE
COUPLING
SEE C
SLAT 4
LOWER TELESCOPING DUCT
SEE B UPPER TELESCOPING DUCT ASSY SEE D
A
BEARING LOWER TELESCOPING DUCT
BEARING SLAT 4 SLAT 4 INBOARDOUTBOARD TAI DUCTTAI DUCT SLAT
TAI DUCT FLANGE
TAI VALVE
ELECTRICAL SUPPORT CONNECTOR CLAMP
UPPER
WING TAI
TELESCOPING
VALVE
DUCT TAI VALVE FWD
TO UPPER STRUT DUCT
PNEUMATIC Y-DUCT
TAI VALVE CLAMP (DO NOT DISCONNECT)
INBD
B
Wing Telescoping Ducts Installation Figure 401 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
757
MAINTENANCE MANUAL

TAI DUCT SLAT 3 
COUPLING FLEXIBLE 
BOLT 
ASSEMBLY RETAINER 
FWD 
INBD  TAI DUCT OUTBOARD SLAT 4 
C 
PLUG RIB  FLANGE 
END CAP 
PACKING 
FWD INBD BEARING END DUCT  DUCT TELESCOPING UPPER 0-RING  PACKING BEARING O-RING  RING BACKUP FROM TAI VALVE TAI DUCT  SEAL  RIB RING BACKUP 
D 
Figure 401 (Sheet 2) Wing Telescoping Ducts Installation 
　
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