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737-300/400/500MAINTENANCE MANUAL
 S 214-023
 (21) Do a check of the wing structure for damage and warpage if a check of the flap panel clearances is not satisfactory.
 NOTE: This check make sure the flap and the wing structure align
____
 correctly. No adjustments can be made.

 S 864-024
 (22)
 Release pressure from hydraulic system B if it is not necessary (Ref 27-81-00/201).

 S 434-025

 (23)
 Install the landing light lens, if it was removed (AMM 33-42-21/401).

 (24)
 Install the forward wing to the body fairing, if it was removed.

 S 424-026
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 KRUEGER FLAP TO NACELLE AND STRUT SEAL DOOR - MAINTENANCE PRACTICES
___________________________________________________________________
 1.  General_______
 A.  There are five tasks in this procedure. The first and second tasks are the removal and installation of the seal door. The third and fourth tasks are the removal and installation of the seal door spring. The fifth task is the adjustment of the seal door.
 TASK 27-81-14-002-001
 2.  Seal Door Removal_________________
 A.  Special Tools and Equipment
 (1)  
F80048-84, -89 or -90 - Leading Edge Flap Actuator Lock

 B.  
References

 (1)  
27-81-00/201, Leading Edge Flap and Slat Control System

 C.  
Access

 (1)  
Location Zone 101 Control Cabin, LH 102 Control Cabin, RH 302 Wing Outboard Leading Edge with Slats, LH 303 Wing Inboard Leading Edge with Slats, LH 402 Wing Outboard Leading Edge with Slats, RH 403 Wing Inboard Leading Edge with Slats, RH

 D.  
Procedure

 S 862-002
 (1)  
Pressurize hydraulic system B (Ref 27-81-00/201).

 S 862-003

 (2)  
Move the flap control lever to the 1-unit detent to extend the leading edge flaps.

 S 482-004
 WARNING: CAREFULLY INSTALL THE LEADING EDGE FLAP ACTUATOR LOCKS TO
_______ PREVENT ACCIDENTAL OPERATION OF THE LEADING EDGE FLAPS. THE LEADING EDGE FLAPS CAN MOVE QUICKLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (3)  
Install the leading edge flap actuator locks on the actuators of the leading edge flaps (Ref 27-81-00/201).

 (4)
Release the pressure from hydraulic system B (Ref 27-81-00/201).

 S 862-024
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
KRUEGER FLAP SEAL DOOR
SEE A
C 
A  HINGE 
STOP 
BRACKET 
SPRING 
B 
BOLT 
A 
C 
LEVER 
B 
LINK 
SEAL 
SEAL DOOR  SEAL DOOR 
COLLAR 
CAM ROLLER 
INBD  SEE  D 

A

Krueger Flap to Nacelle and Strut Seal Door Installation
Figure 201 (Sheet 1)

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 27-81-14
 ALL  ú ú 01 Page 202 ú Nov 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
SEAL DOOR EXTENDED
SEE
C

SUPPORT PLATE
COLLAR

SEAL DOOR SHAFT

C-C

Krueger Flap to Nacelle and Strut Seal Door Installation
Figure 201 (Sheet 2)

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