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

 S 024-008

 (5)  
Remove the slat up switch:

 (a)  
Remove the lower access panels at the wing leading edge (AMM 12-31-61/201).

 S 864-013
 NOTE: There are slat up switches at slat stations
____ 83.24, 152.23, and 277.47 at each wing (SB 27-1174).
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737-300/400/500MAINTENANCE MANUAL
 (b)  
Get access to the switches (installed on the inside of the wing leading edge) through the lower access panels forward of the wing front spar and then through the lightening holes in the nose beam of the wing fixed leading edge or through the slot in the 65C26219 panel at station 277.33 (SB 27-1174).

 (c)  
Remove the bolts and washers from the slat up switch.

 (d)  
Remove the slat up switch.

 TASK 27-81-45-404-002
 3. Leading Edge Slat Up Switch Installation
________________________________________
 A. References
 (1)  
27-81-00/201, Leading Edge Flap and Slat Control System

 B.
Access

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

 C.
Procedure

 S 424-006
 (1)  
Install the slat up switch:

 (a)  
Put the slat up switch in its position.

 NOTE: Apply BMS 5-95 sealant between bracket and cove panel
____ and between bracket and switch (SOPM 20-50-12).
 (b) Install the nuts and washers on the slat up switch.
 NOTE: You can install zero to three washers between the switch
____ and the support to prevent contact between the switch and the inner skin panel of the leading edge.
 (c)  
Tighten the nuts to 25-30 pound-inches.

 (d)  
Install the wires to the switch.

 S 864-017
 (2)
Remove the DO-NOT-CLOSE tag and close this circuit breaker:

 (a)  
P6 Circuit Breaker Panel
 1) MASTER DIM INDICATOR SECT 6

 (3)  
Pressurize hydraulic system B (Ref 27-81-00/201).

 S 864-019

 (4)  
Move the flap control lever to the 1-unit detent.

 (a)  
Make sure the amber TRANSIT lights on the leading edge annunciator panel come on while the slats extend.

 (b)  
Make sure the amber TRANSIT lights go out when the slats are extended.

 S 864-005
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH THE LEADING ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 (c)  Make sure the green EXT lights come on when the slats are extended.
 (5)  S 864-004Move the flap control lever to the FLAP UP detent. (a) Make sure the TRANSIT annunciator lights come on while the slats retract. (b) Make sure all the lights on the annunciator panel go out when the slats are fully retracted.
 (6)  S 864-003Release pressure from hydraulic system B (Ref 27-81-00/201).
 (7)  S 424-021Install the lower wing access panels and apply BMS 5-95 sealant on faying surfaces (SOPM 20-50-12).

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 LEADING EDGE SLAT AERODYNAMIC SEAL - REMOVAL/INSTALLATION
　
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