(i)  
Follow the instructions on the CDU display.

 1)  Make sure the position indications are in the permitted limits.

 (j)  
Push the INIT/REF key to go out of the BITE.

 S 864-022
 (5)  
Remove the electrical power (AMM 24-22-00/201).

 (6)  
Remove the system B hydraulic power (AMM 27-51-00/201).

 S 864-023
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 FLAP POSITION TRANSMITTER GEARBOX - 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 gearbox for the flap position transmitter. This procedure is applicable to the left and the right gearboxes.
 B.  It is not necessary to remove the flap position transmitter to remove the gearbox.
 TASK 27-58-31-004-001
 2.  Flap Position Transmitter Gearbox Removal (Fig. 401)
_________________________________________
 A.  References
 (1)  
27-51-00/201, Trailing Edge Flap System

 B.  
Access

 (1)  
Location Zone 307, 407 Wing Trailing Edge Outboard Flap and Spoiler

 C.  
Procedure

 S 864-002
 (1)  
Supply the hydraulic system B power (Ref 27-51-00/201).

 S 864-003

 (2)  
Put the flap control lever in the 40-unit detent to extend the flaps.

 (3)  
Remove the system B hydraulic power (Ref 27-51-00/201).

 S 034-005

 (4)  
Disconnect the torque tubes from the gearbox:

 (a)  
Remove the three screws from the two coupling sleeves.

 S 864-004
 CAUTION: INSTALL A SUPPORT TO HOLD THE TORQUE TUBES WHILE THEY ARE
_______ NOT CONNECTED. THE TORQUE TUBES CAN BE DAMAGED.
 (b)  Move the coupling sleeves off the couplings on the gearbox.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
SEE A
FLAP POSITION FLAP POSITION
TRANSMITTER TRANSMITTER GEARBOX
(EXAMPLE) TORQUE TUBE  FWD  INBD 
BOLT (4 LOCATIONS) GEARBOX MOUNTING CONNECTOR ELECTRICAL  A  SLEEVES COUPLING 
Flap Position Transmitter Gearbox Installation Figure 401 

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 024-006
 (5)  
Remove the gearbox:

 (a)  
Disconnect the electrical connector from the flap position transmitter.

 (b)  
Remove the four bolts that attach the gearbox to the rear spar of the wing.

 (c)  
Remove the gearbox from the airplane.

 TASK 27-58-31-404-007
 3.  Flap Position Transmitter Gearbox Installation (Fig. 401)______________________________________________
 A. Consumable Materials
 (1)  
C00259 Primer BMS 10-11, Type 1

 (2)  
D00633 Grease BMS 3-33 (Recommended)

 (3)  
D00013 Grease MIL-G-23827 (Alternate)

 B.
References

 (1)  
27-51-00/201, Trailing Edge Flap System

 (2)  
27-58-01/501, Trailing Edge Flap Position Indicating System

 (3)  
27-58-12/401, Flap Position Transmitter

 C.
　
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