1 ENGINES POST-CFMI-SB 73-026 FWD
2 ENGINES PRE-CFMI-SB 73-026
B
VBV Reset Solenoid Installation
Figure 401

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
TASK 73-21-11-404-007-C00
 3. VBV Reset Solenoid Installation
_______________________________
 A. Equipment
 (1) Ohmmeter - with the capacity to measure 40 megaohms
 B. Consumable Materials
 (1)  Petrolatum - Pure Mineral (CP2102)
 C. References
 (1)  
AMM 71-00-00/501, Power Plant

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

 (3)  
AMM 78-31-00/201, Thrust Reverser System

 D. Access
 (1)  
Location Zones
 506 Engine No. 1 - Aft side of MEC
 606 Engine No. 2 - Aft side of MEC

 (2)  
Access Panels 5783L Engine No. 1 - Fan Duct Cowl and Thrust Reverser 5838R Engine No. 2 - Fan Duct Cowl and Thrust Reverser

 E. Procedure
 S 644-008-C00
 (1)
Lightly apply a layer of petrolatum on two new o-rings.

 S 434-009-C00

 (2)  
Install the o-rings on the solenoid.

 S 424-002-C00

 (3)  
ENGINES PRE-CFMI-SB 73-026;
 Install the solenoid as follows:

 (a)  
Install the two short screws.

 (b)  
Tighten the screws to 13-16 pound-inches (1.5-1.8 Newton meters).

 S 434-010-C00
 (4)  ENGINES POST-CFMI-SB 73-026;
 Install the solenoid as follows:

 (a)  
Put the solenoid in position on the MEC.

 (b)  
Install the two long screws.

 (c)  
Tighten the screws by hand.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(d)  
Make sure that you install the clamp correctly.

 (e)  
Tighten the screws to 19-22 pound-inches
 (2.2-2.5 Newton meters).

 S 764-011-C00
 (5)  Do an electrical resistance check for the solenoid as follows:
 (a)  
Do a check to see that the resistance across the pins of the solenoid is between 72 and 88 ohms.

 (b)  
Do a check to see that the insulation resistance between the pins and the solenoid body is 40 megaohms minimum.

 S 434-012-C00
 (6)  Connect the electrical connector D3012 to the solenoid.
 S 414-018-C00
 WARNING: OBEY THE INSTRUCTIONS IN THIS PROCEDURE WHEN YOU CLOSE THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (7)  
Close the left thrust reverser half (AMM 78-31-00/201).

 S 414-019-C00

 (8)  
Close the right fan cowl panel (AMM 71-11-02/201).

 S 794-014-C00

 (9)  
Do an idle leak check (AMM 71-00-00/501).

 S 794-015-C00

 (10)
 Do a check on the solenoid for leaks.

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