75-31-01
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CFM56 ENGINES
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(5)  Parting Agent - Refer to Boeing Process Specification BAC5000, General Sealing, for a list of suitable parting agents and their suppliers.
 (6) Primer and Sealant - BMS5-63, Type 1, Class B-4 ú (7) Primer and Sealant - BMS5-63, Type 2, Class B-4 (Optional to ú BMS5-63, Type 1 primer and sealant)
 (8)  
A00003 Primer - Red, 1200 (CP2244) (AMM 70-10-01/201)

 (9)  
A00474 Sealant - DC 93-006-1 (AMM 70-10-01/201)

 C.  References
 (1)  
AMM 70-10-01/201, Consumable Materials

 (2)  
AMM 71-00-00/501, Power Plant

 (3)  
AMM 75-31-02/501, Variable Stator Vane Feedback Cable

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

 D.  Access
 (1)  
Location Zones 506 Engine No. 1 - attached to the forward stator case of the HPC at the 1:30 and 7:30 o'clock positions

 606  Engine No. 2 - attached to the forward stator case of the HPC at the 1:30 and 7:30 positions

 (2)  
Access Panels 5739L/5783L Engine No. 1 - Thrust Reverser Half 5839R/5838R Engine No. 2 - Thrust Reverser Half

 E.  Procedure
 S 784-056-C00
 (1)  Do the pressure test.
 (a)  Connect the hydraulic cart as follows (Fig. 402): 1) Disconnnect the VSV head and rod end coupling nuts (tube to hose) at the main engine control (MEC).
 2)  Connect the hydraulic cart supply and return hoses to the VSV head and rod end fuel tubes.
 NOTE:  Dry air, nitrogen or an argon source can be used if
____ the hydraulic cart pump is not available.
 S 784-024-C00
 (2) Do a pressure test of the fuel tubes for leaks (Fig. 402).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
9 O'CLOCK FAN FRAME STRUT BRACKET
SEE  A  TUBE HEAD END VSV  ROD END TUBE VSV 
HOSE HEAD END VSV  HOSE ROD END VSV 
HEAD 

ROD
MAIN ENGINE 
CONTROL 
SUPPLY AND 
RETURN HOSES 
HAND PUMP 
HYDRAULIC 
CART 
A 
G-M56-MM-0205(1)-00-B 
Fuel Supply Tube Pressure Test Connections 
Figure 402

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
CAUTION:_______DO NOT USE MORE THAN 300 PSI (2100 KPA) PRESSURE. DAMAGE CAN BE CAUSED TO THE ENGINE PARTS.
 (a)  With the hydraulic cart supply and return hoses connected, do the check that follows: 1) Make sure all the fuel tube connections are leak tight.
 NOTE: To do this, apply pressure through the VSV head and
____ rod end fuel supply tubes at the MEC. The pressure must be 200-300 psi (1400-2100 kPA). If dry air, nitrogen, or an argon source is used, apply a leak detector to each connection.
 a) Do a check for leaks at each connection.
 b) No indication of leaks is permitted.
 (b)  
Release the pressure and disconnect the hydraulic cart supply and return hoses from the VSV head and rod end fuel tubes.

 (c)  
Connect the coupling nuts of the head and rod end of the VSV
 (tube to hose).

 (d)  
Tighten them to 135-150 pound-inches (15.3-17.0 Newton meters).

 S 434-025-C00
 (3)  Connect the head and rod end shrouds.
 (a)  
Hand tighten the head and rod end shrouds.
　
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