77-21-01
 ALL  ú ú C02 Page 202 ú Mar 12/00
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////

EGT Thermocouple Harness and Probe Disconnection

Figure 201

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 77-21-01
 ú ú C02 Page 203 ú Nov 15/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
EXHAUST GAS TEMPERATURE (EGT) THERMOCOUPLE HARNESS AND PROBES -
_______________________________________________________________ REMOVAL/INSTALLATION
____________________
 TASK 77-21-01-904-001-C01
 1.  EGT Thermocouple Harness and Probe Removal and Installation___________________________________________________________
 A. General
 (1) Do not use this configuration.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. 6 PROBE EGT SYSTEM ú

 77-21-01
 ú CONFIG 1 ú C01A Page 401 ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
EXHAUST GAS TEMPERATURE (EGT) THERMOCOUPLE HARNESS AND PROBES -
_______________________________________________________________
 REMOVAL/INSTALLATION

____________________
 1.  General_______
 A.  This procedure contains 12 tasks, the removal and the installation of
 each of these parts of the EGT thermocouple harness and probes:

 (1)  
Forward EGT extension cable

 (2)  
Left EGT thermocouple harness and probes

 (3)  
Lower EGT extension harness

 (4)  
Lower EGT thermocouple harness and probes

 (5)  
Right EGT extension harness

 (6)  
Right EGT thermocouple harness and probes.

 B.  You can remove or install each part of the EGT thermocouple harness and
 probes by itself.

 C.  There is no recommended sequence of removal or installation if you must
 remove all the parts of the EGT thermocouple harness and probes.

 TASK 77-21-01-004-016-C02
 2.  Forward EGT Extension Cable Removal___________________________________
 A.  Equipment
 (1)  Fork Wrench - AN8508-14, Snap-on Tools Company, 8049-28th St Kenosha, WI 53140
 B.  References
 (1)  
AMM 71-11-02/201, Fan Cowl Panels

 (2)  
AMM 78-31-00/201, Thrust Reverser System

 C.  Access
 (1)  
Location Zones
 504 Left Engine - Left Side
 604 Right Engine - Left Side

 (2)  
Access Panels
 5738L Left Thrust Reverser - Left Engine
 5838R Left Thrust Reverser - Right Engine

 D.  Prepare to Remove the Forward EGT Extension Cable
 S 864-074-C02
 (1)  AIRPLANES WITHOUT EIS; For the applicable engine, open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P6 Overhead Circuit Breaker Panel
 1) EGT IND ENG 1
 2) EGT IND ENG 2

 S 864-075-C02
 (2)  AIRPLANES WITH EIS; For the applicable engine, open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P6 Overhead Circuit Breaker Panel
 1) EIS PRI 2
 2) EIS PRI 4

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