73-21-01
 ALL  ú ú C05 Page 441 ú Nov 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
COMPRESSOR INLET TEMPERATURE SENSOR - REMOVAL/INSTALLATION
__________________________________________________________
 1.  General
_______
 A.  The CIT sensor is installed in a port between the 3 and 6 o'clock struts (viewed forward) on the fan frame.
 B.  The coil points into the inlet airstream of the high pressure compressor (HPC), in front of the extension ring on the fan case.
 C.  For this procedure the Compressor Inlet Temperature (CIT) sensor will be referred to as the sensor.
 TASK 73-21-02-004-001-C00
 2.  CIT Sensor Removal
__________________
 A.  General
 (1) This task contains the steps to remove the sensor.
 B.  References
 (1)
AMM 24-22-00/201, Manual Control

 (2)
AMM 71-11-02/201, Fan Cowl Panels

 (3)
AMM 72-33-03/401, Fan Duct Panel

 (4)
AMM 78-31-00/201, Thrust Reverser

 C.  Access
 (1)  
Location Zones
 502/602 Left Fan Cowl Panels
 503/603 Right Fan Cowl Panels
 504/604 Left Thrust Reversers
 505/605 Right Thrust Reversers
 506 Engine No. 1 - Turbine Frame
 606 Engine No. 2 - Turbine Frame

 (2)  
Access Panels
 5737L Engine No. 1 - Right Fan Cowl Panel
 5738L Engine No. 1 - Left Thrust Reverser
 5739L Engine No. 1 - Right Thrust Reverser
 5746L Engine No. 1 - Left Fan Cowl Panel
 5837R Engine No. 2 - Right Fan Cowl Panel
 5838R Engine No. 2 - Left Thrust Reverser
 5839R Engine No. 2 - Right Thrust Reverser
 5846R Engine No. 2 - Left Fan Cowl Panel

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 73-21-02
 ALL  ú ú C01 Page 401 ú Mar 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
D. Prepare to Remove the Sensor
 S 864-002-C00
 (1)  Remove the electrical power (AMM 24-22-00/201).
 (a)  Set the BAT switch on the Electrical Meters Battery and Galley Power Module (P5-13) to the OFF position and install a DO-NOT-OPERATE tag.
 S 014-003-C00
 (2)  Open the right fan cowl panel (AMM 71-11-02/201).
 S 014-004-C00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 TO OPEN THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURY TO PERSONS OR DAMAGE TO THE EQUIPMENT CAN OCCUR.
 (3)  
Open the right thrust reverser (AMM 78-31-00/201).

 S 034-005-C00

 (4)  
Remove the fan duct panel between the 5 and 6 o'clock struts (AMM 72-33-03/401).

 S 034-006-C00

 (5)  
Disconnect the drain lines, nuts and bolts from the sensor
 (Fig. 401).

 (a)  
Disconnect the P6 drain line from the P6 fitting shroud.

 (b)  
Disconnect the PB drain line from the PB fitting shroud.

 (c)  
Turn the two shroud knurled nuts counterclockwise. 1) Move the shrouds aft off from the flanges.

 (d)  
Remove the 2 bolts that attach each threaded flange to the fan frame. 1) Move the flanges aft to get at the coupling nuts on the

 fuel line.
 S 034-007-C00
 CAUTION: DO NOT TURN THE SLEEVES TO PREVENT DAMAGE TO THE SENSOR
_______ FITTINGS. IF YOU DO NOT OBEY THE PRECAUTION, DAMAGE TO THE EQUIPMENT CAN OCCUR.
 (6)  Pull the 2 sleeves aft along the fuel lines until the sleeves fully disengage from the sensor fittings.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
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