S 034-016

 (5)  
Remove the screws that hold the cables in place on the top and the bottom of the MAWEA card file.

 S 034-019

 (6)  
Disconnect the cables from the MAWEA card file.

 S 034-017

 (7)  
Remove the five mounting screws from each side of the MAWEA card file.

 S 024-018

 (8)  
Remove the MAWEA card file.

 TASK 31-51-03-404-020
 3.  MAWEA Card File Installation (Fig. 401)____________________________
 A. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 31-51-00/501, MAWEA

 (3)  
AMM 31-51-01/401, MAWEA Power Supply Units

 (4)  
AMM 31-51-02/401, MAWEA Printed-Circuit Card

 B. Access
 (1)  Location Zone 116 Area Between Nose Gear Well and Fuselage - RH
 C. Procedure
 S 424-025
 (1)
Set the MAWEA card file in place onto the two guide pins.

 S 434-022

 (2)  
Install the five mounting screws on each side of the MAWEA card file.

 (3)  
Connect the cables to the MAWEA card file.

 S 434-024

 (4)  
Install the screws that hold the cables in place on the top and the bottom of the MAWEA card file.

 S 434-023
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747-400 MAINTENANCE MANUAL
 S 434-026
 (5)  Install the power supply units in the MAWEA card file
 (AMM 31-51-01/401).

 S 434-031
 CAUTION: DO NOT TOUCH THE CONNECTOR PINS OR OTHER CONDUCTORS ON THE
_______ MAWEA PRINTED-CIRCUIT CARDS. IF YOU TOUCH THESE CONDUCTORS, ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO THE PRINTED-CIRCUIT CARDS.
 (6)  
Install the printed-circuit cards in the MAWEA card file
 (AMM 31-51-02/401).

 S 424-038

 (7)  
Install the buttons in the MAWEA monitor panel.

 S 864-032

 (8)
Close these circuit breakers and remove the DO-NOT-CLOSE tags:

 (a)  P7, Overhead Circuit Breaker Panel
 1) 7A01, MAWEA PWR A
 2) 7B01, MAWEA PWR B

 D. MAWEA Card File Test
 S 864-033
 (1)  
Supply electrical power (AMM 24-22-00/201).

 (2)  
Do the MAWEA - System Test (AMM 31-51-00/501).

 (3)
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 S 734-028
 S 864-034
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747-400 MAINTENANCE MANUAL
 SPEED BRAKE SWITCH - REMOVAL/INSTALLATION
_________________________________________
 1.  General_______
 A.  There are two tasks in this procedure. There is a task for the removal and a task for the installation of the speed brake switch S1927.
 (1)  
The removal procedure has these parts:

 (a)  
The retraction of the automatic speed brake actuator

 (b)  
The removal of the ceiling panel

 (c)  
The removal of the wires from the speed brake switch

 (d)  
The removal of the speed brake switch

 (2)  
The installation procedure has these parts:

 (a)  
The installation of the speed brake switch

 (b)  
The installation of the wires on the speed brake switch

 (c)  
An operational test of the speed brake switch

 (d)  
The installation of the ceiling panel.

 TASK 31-51-04-004-001
 2.  Speed Brake Switch Removal (Fig. 401)__________________________
　
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