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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
FLOW - CC/MIN

24,000
22,000
20,000
18,000
16,000
14,000
12,000
10,000
 8,000
6,000
4,000
 2,000
 0

18 19 20 21 22
CURRENT - AMPS/PHASE - ABOVE SYSTEM BASIC CURRENT
Pump Characteristics
Figure 603 (Sheet 1)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL

24,000
22,000
20,000
18,000
16,000
14,000
12,000
10,000
 8,000
6,000
FLOW - CC/MIN

4,000
 2,000
 0
CURRENT - AMPS/PHASE - ABOVE SYSTEM BASIC CURRENT

Pump Characteristics
Figure 603 (Sheet 2)

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A
737-300/400/500MAINTENANCE MANUAL
 D. Procedure
 S 846-028
 (1)  
Do the Prepare for an Internal Leak Check procedure.

 S 866-029

 (2)  
If you use the ammeter procedure, set the ammeter to its highest range.

 S 216-030

 (3)  
Make sure the pressure in system B is a minimum of 2800 psi.

 NOTE: System A hydraulic power must be off.
____
 S 976-249
 (4)  If you use the ammeter or amp-clamp method do this step:
 NOTE: This amperage is the System B Basic Current, and must
____ be subtracted from all other system B amperage readings before you use Fig. 603 to find the equivalent flow.
 (a)  Read the amperage and write it here:
 NOTE: Write down a flow value of zero.
____
 Amperage _______________ (System B Basic Current)
 Flow _______________ cc/minute (Value 1)
 S 796-241
 (5)  If you use the flow meter method, read the flow value and write it here:
 Flow _______________ cc/minute (Value 1)
 S 866-032
 (6)  Do these steps to supply hydraulic power from system B to the flight controls.
 (a)  
Put the SPOILER B switch in the ON position.

 (b)  
Put the speed brake lever half the distance between the ARMED and the FLIGHT DETENT positions.

 (c)  
Put the arm switch for the ALTERNATE FLAPS in the OFF position.

 NOTE: The flaps will move to 40 units.
____
 (d)  
Set the flap control lever to 25 units, and let the flaps move.

 (e)  
Put the FLT CONTROL B switch in the ON position.

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737-300/400/500MAINTENANCE MANUAL
 (f)  Do these steps with the DFCS BITE to engage the autopilot one channel at a time.
 NOTE: Engage the autopilot in BITE to make sure all the inputs
____
 are at zero.

 1) Push the key for INIT/REF (CDU key).
 2) Push the key for INDEX (LSK 6L).
 3) Push the key for MAINT (LSK 6R).
　
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