24-21-61
 ALL  ú ú 03 Page 604 ú Nov 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 (5)  S 866-032ENGINES WITH A CSD; Stop the engines (AMM 71-00-00/201).
 (6)  S 866-025Remove the external electrical power (AMM 24-22-00/201).

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 24-21-61
 ALL  ú ú 01 Page 605 ú Nov 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 CURRENT TRANSFORMER - REMOVAL/INSTALLATION
__________________________________________
 1.  General
_______
 A.  This procedure contains two tasks:
 (1)  
The removal of the current transformers

 (2)  
The installation of the current transformers.

 B.  
The removal and installation of each current transformer is almost the same; only the location and access are different.

 (1)  
Transformer T1 is on the left side of the engine fan case, above the CSD.

 (2)  
Transformer T2 is on the APU near the generator.

 (3)  
Transformer T4 is in panel P6-11.

 (4)  
Transformer T5 is in panel P6-12.

 (5)  
Transformers T7, T8, and T9 are on the right forward ceiling of the electronic compartment.

 C.  
ENGINES WITH THE VSCF GENERATOR/CONVERTERS; The current transformer T1 is on the engine, but it is not used. The electrical connector has a cap on it.

 TASK 24-21-71-004-002
 2.  Current Transformer Removal (Fig. 401)
___________________________
 A.  References
 (1)  
24-22-00/201, Manual Control

 (2)  
71-11-02/201, Fan Cowl Panels

 B.  
Access

 (1)  
Location Zone
 102 Control Cabin - Right
 205 Electronic Compartment
 502 LH Fan Cowl, Left Nacelle
 602 LH Fan Cowl, Right Nacelle
 703 APU Compartment

 (2)  
Access Panel
 1201L Electronic Equipment Access Door
 3804 APU Cowl Door
 5746L Fan Cowl Assy
 5846R Fan Cowl Assy

 C.  
Procedure

 S 864-004
 WARNING: REMOVE ELECTRICAL POWER FROM THE AIRPLANE BEFORE YOU REMOVE OR
_______ INSTALL A CURRENT TRANSFORMER. IF YOU DO NOT REMOVE THE ELECTRICAL POWER, THE HIGH VOLTAGE CAN KILL YOU.
 (1)  
Make sure all electrical power is off (Ref 24-22-00/201).

 S 014-003

 (2)  
Get access to the current transformer:

 (a) For T1, open the fan cowl panel (Ref 71-11-02/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
CURRENT TRANSFORMER T1
SEE A
CURRENT
TRANSFORMER T1

FWD
A
FWD
Current Transformer Component Location
Figure 401 (Sheet 1)

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 24-21-71
 ALL  ú ú 02 Page 402 ú Mar 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
APU 
GENERATOR 
SEE  A 
AC GENERATOR 
GENERATOR 
TERMINALS 

B

Current Transformer Component Location
Figure 401 (Sheet 2)

CURRENT TRANSFORMER MOUNT ASSEMBLY
GROUND BUS
BAR ANGLE

CURRENT TRANSFORMER T2
GROUND LEAD
CURRENT TRANSFORMER CONNECTOR
FWD
NOTE:  COOLING AIR CROSSOVER DUCT OMITTED.
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