75-24-02
 CLEARANCE CONTROL (HPTCC) TIMER  ú ú C01 Page 203 ú Jul 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
HIGH PRESSURE TURBINE CLEARANCE CONTROL TIMER - REMOVAL/INSTALLATION
____________________________________________________________________
 1.  General
_______
 A.  This procedure contains two tasks. The first task is to remove the High Pressure Turbine Clearance Control (HPTCC) Timer. The second task is to install the HPTCC Timer.
 B.  The HPTCC Timer is found on the left fan case at the 10 o'clock position.
 TASK 75-24-02-004-001-C00
 2.  Remove the High Pressure Turbine Clearance Control (HPTCC) Timer
________________________________________________________________
 A.  References
 (1)  AMM 71-11-02/201, Fan Cowl Panel
 B.  Access
 (1)  
Location Zone
 506 Engine No. 1 - Fan Frame
 606 Engine No. 2 - Fan Frame

 (2)  
Access Panel
 5746 Fan Cowl Panel (LH) - Engine No. 1
 5846 Fan Cowl Panel (LH) - Engine No. 2

 C.  Procedure (Fig. 401)
 S 014-002-C00
 (1)  
Open the left fan cowl panel (AMM 71-11-02/201).

 S 034-003-C00

 (2)  
Remove the nut and bolt from the clamp that attaches the TC1 tube to the bracket on the engine flange H.

 S 034-004-C00

 (3)
Disconnect the seven tubes that follow from the HPTCC Timer:

 (a)  
PB tube.

 (b)  
PC tube.

 (c)  
TC1 tube.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ENGINES WITH THE HIGH PRESSURE TURBINE ú

 75-24-02
 CLEARANCE CONTROL (HPTCC) TIMER  ú ú C01 Page 401 ú Jul 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
HPTCC TIMER LOCKOUT 
SOLENOID VALVE 
TC2  FUEL SUPPLY 
LINE (REF) 
FWD 
SEE  A  HPT CLEARANCE  TC1 
CONTROL TIMER 
ENGINE  SEE  B 
FLANGE E 
BOLT  TS9 
FORWARD 
BRACKET  TS5 
CLAMP 
BOLT  ENGINE FLANGE H 
FUEL FLOW 
AFT BRACKET  PC  PB  TRANSMITTER 
TC3 TIMER  (REF) 
TC1  A

BOLT (2 LOCATIONS)
B
High Pressure Turbine (HPT) Clearance Control Timer Installation Figure 401
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ENGINES WITH THE HIGH PRESSURE TURBINE ú

 75-24-02
 CLEARANCE CONTROL (HPTCC) TIMER  ú ú C01 Page 402 ú Jul 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(d)  
TC2 tube.

 (e)  
TC3 tube.

 (f)  
TS5 tube.

 (g)  
TS9 tube.

 S 024-005-C00
 (4)  Hold the HPTCC Timer with your hand and do the steps that follow:
 (a)  
Remove the bolt that attaches the forward end of the HPTCC Timer to the bracket on the engine flange E.

 (b)  
Remove the bolts that attach the aft end of the HPTCC Timer to the bracket on the engine flange H.

 S 024-006-C00
 (5)  
Move the tubes away from the HPTCC Timer and remove the timer from the engine.

 S 434-007-C00

 (6)  
Install caps on the tube fittings on the HPTCC Timer and the disconnected tubes.

 TASK 75-24-02-404-008-C00
 3. Install the High Pressure Turbine Clearance Control (HPTCC) Timer
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 A. Consumable Materials
 (1)  
　
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