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 4) Push the key for DFCS (LSK 2L).
 5) Push the key for the NEXT PAGE (CDU key).
 6) Push the key for RIGGING (LSK 2L).
 7) Ignore the TURN OFF HYD SYS A & B instruction and push the
 key for CONTINUE.
 8) Push the key for ELEVATOR (LSK 1L).
 9) Push the key for ELEV AUTH SINGLE (LSK 2L).
 10) Push the key for CONTINUE on screen 51.20.
 11) Push the key for CONTINUE on screen 51.21.
 12) On the second page of screen 51.21, engage the system B
 autopilot.
 S 976-250
 (7)  Read the amperage or the flow value and write it here:
 Amperage _______________ (Subtract System B Basic Current First)
 Flow _______________ cc/minute (Value 2)
 S 976-034
 (8)  
Subtract the Value 1 flow from the Value 2 flow. If the difference is more than 13,100 cc/min, you must do more tests to find the parts that have too much leakage.

 S 866-035

 (9)  
Remove hydraulic power from system B (AMM 29-15-00/201).

 S 486-036

 (10)
 Connect the equipment that is necessary to measure the flow to hydraulic system A.

 S 866-037
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES. THE AILERONS, RUDDER, ELEVATOR, FLAPS, SLATS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (11) Supply hydraulic power to system A.
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737-300/400/500MAINTENANCE MANUAL
 S 216-038
 (12)
 Make sure the pressure in system A is a minimum of 2800 psi.

 S 976-251

 (13)
 If you use the ammeter or amp-clamp method do this step:

 NOTE:  This amperage is the System A Basic Current, and must
____ be subtracted from all other system A 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 A Basic Current)
 Flow _______________ cc/minute (Value 3)
 S 976-252
 (14) If you use the flow meter method, read the flow value and write it here:
 Flow _______________ cc/minute (Value 3)
 S 866-040
 (15) Do these steps to supply hydraulic power from system A to the flight controls and landing gear.
 (a)
Put the SPOILER A switch in the ON position.

 NOTE:  Keep the speed brake lever half the distance between the ARMED and the FLIGHT DETENT positions.

 (b)
Put the FLT CONTROLS A switch in the ON position.

 (c)
Put the LANDING GEAR handle in the down position.

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 (d)  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).
 4) Push the key for DFCS (LSK 2L).
 5) Push the key for the NEXT PAGE (CDU key).
 6) Push the key for RIGGING (LSK 2L).
 7) Ignore the TURN OFF HYD SYS A & B instruction and push the
 key for CONTINUE.
 8) Push the key for ELEVATOR (LSK 1L).
 9) Push the key for ELEV AUTH SINGLE (LSK 2L).
 10) Push the key for CONTINUE on screen 51.20.
 11) Push the key for CONTINUE on screen 51.21.
 (e)  On the second page of screen 51.21, engage the system A autopilot.
 S 976-253
 (16) Read the amperage or the flow value and write it here:
 Amperage _______________ (Subtract System A Basic Current First)##
　
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