S 734-034

 (5)
Do this task: AC Generation - System Test (AMM 24-21-00/501).

 TASK 24-21-41-024-003
 6.  Remove the MPCB from the Right Forward Compartment (Fig. 402)
__________________________________________________
 A.  Access
 (1)  
Location Zones
 202 Lower Nose Compartment

 (2)  
Access Panels
 3103 Nose Wheel Right Wall Panel - Forward
 3105 Nose Wheel Right Wall Panel - Aft

 B.  
Prepare for the Removal

 S 864-031
 (1)  
Remove electrical power (AMM 24-22-00/201).

 S 014-011

 (2)  
Remove the two access panels, 3103 and 3105, from the right inner wall of the nose wheel well.

 C.  
Procedure

 S 024-017
 WARNING: MAKE SURE ALL THE POWER IS OFF BEFORE YOU TOUCH A CONDUCTOR IN
_______ THE CONTROL COMPARTMENTS. ELECTRICAL SHOCKS CAN CAUSE INJURY TO PERSONS.
 (1)  Remove the MPCB:
 (a)  Remove the two screws which attach the MPCB cover plate.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 24-21-41
 ALL  ú ú 01 Page 407 ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
SEE B
RIGHT FORWARD
COMPARTMENT

SEE A
FWD
RIGHT FORWARD COMPARTMENT OUTBOARD OF NOSE WHEEL WELL
A
ENGINE
GENERATOR
CIRCUIT
BREAKER 2
ENGINE EXTERNAL
GENERATOR POWER
CIRCUIT CONTACTOR 1
BREAKER 1
3103
FORWARD
AFT ACCESS
ACCESS DOOR
DOOR
EXTERNAL
POWER
CONTACTOR 2

FWD
B
Main Power Circuit Breaker Installation
Figure 402

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 24-21-41
 ALL  ú ú 01 Page 408 ú Jul 15/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (b)  
Remove the cover plate.

 (c)  
Remove the six electrical cables from the terminal studs. 1) Tag each cable with the correct identification to help with installation. 2) Make a note of the position of the cable terminals, plain washers, lockwashers, and nuts on each terminal stud.

 3)  Where more than one cable attaches to a stud, attach the parts together, and tag for each stud.

 (d)  
Disconnect the electrical connector.

 (e)  
Remove the four MPCB installation screws.

 (f)  
Remove the MPCB.

 TASK 24-21-41-424-004
 7.  Install the MPCB in the Right Forward Compartment (Fig. 402)_________________________________________________
 A.  Consumable Materials
 (1)  
D00015 Grease

 B.  
Access

 (1)  
Location Zones
 202 Lower Nose Compartment

 (2)  
Access Panels
 3103 Nose Wheel Right Wall Panel - Forward
 3105 Nose Wheel Right Wall Panel - Aft

 C.  
Prepare for the Installation

 S 214-018
 WARNING: MAKE SURE ALL THE POWER IS OFF BEFORE YOU TOUCH A CONDUCTOR IN
_______ THE CONTROL COMPARTMENTS. ELECTRICAL SHOCKS CAN CAUSE INJURY TO PERSONS.
 (1) Examine the cables for damage caused by heat or corrosion.
 CAUTION:_______DO NOT USE METAL OXIDE ABRASIVES. YOU CAN CAUSE DAMAGE TO THE TERMINAL.
 (a)  
Remove the corrosion with sandpaper.

 (b)  
If the terminal or the cable is damaged replace the terminal if the cable has the sufficient length. 1) Refer to the Notes Section of the Wire Diagram Manual for

 the terminal installation instructions.

 (c)  
If the cable is too short, replace the cable.

 D.  Procedure
 S 424-020
 (1)  Install the MPCB:
 (a)  
Put the MPCB in the correct position.
　
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