(a)  
Discard the O-rings from these MEC ports.

 (b)  
VBV OPEN port

 (c)  
VSV HEAD port

 (d)  
TC1 port

 (e)  
TC2 port

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
SEE  A 
VBV OPEN END PORT  VBV CLOSED END FITTING AND PORT  A 
B  B 

CDP (PS3) PORT
CBP PORT
CC A
A
MEC Port Locations Figure 411 (Sheet 1)
E34491
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
VBV OPEN END PORT
VBV CLOSED
END PORT

PCR PORT
OVERBOARD
DRAIN PORT

TOP VIEW B-B
1 ON ENGINES WITHOUT THE HPTCC TIMER, THE PC AND TC3 PORTSARE PLUGGED
PC PORT 1
TC3 PORT
1
RIGHT END VIEW A-A
HEATED SERVO
SUPPLY PORT

BOTTOM VIEW C-C
MEC Port Locations Figure 411 (Sheet 2)
CBP PORT
CDP (PS3) PORT
E34541
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 ALL  ú ú C01 Page 426 ú Jul 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
SEE A
VBV CLOSED 
END FITTINGS 
AND PORT  A 
VBV OPEN 
END PORT 

SEE B
A A
MEC Fittings and O-Rings Figure 412 (Sheet 1)
CDP (PS3) PORT
CBP PORT
E34983
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
DSEE PC PORT  1 
END LINE VSV HEAD  SEE TC3  TC1 TC2 D 1 
MEC 
SEE  C  ENGINE INBD 
FWD  SOLENOID IDLE RESET 
MEC  B  VIEW IN THE FORWARD DIRECTION C 

O-RING
FITTING AT PLUG AT PC PC AND TC3 AND TC3 PORTS PORTS
PORT PORT
O-RING
EXAMPLE OF PC AND TC3 PORTS, FITTINGS AND O-RINGS
D
1 ON ENGINES WITHOUT THE HPTCC TIMER, THE PC AND TC3 PORTS ARE PLUGGED. MEC Fittings and O-RingsFigure 412 (Sheet 2)
E35027
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 ALL  ú ú C01 Page 428 ú Jul 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
VSV HEAD 
FITTING 
TC2 
FITTING 
O-RING 
CIT (P6) 
CIT (P6)  PORT  O-RING 
FITTING  TC1 FITTING 
O-RING 
PB 
FITTING 
VSV HEAD 
PORT 
TC2 PORT 
　
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