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

 (c)  
Read the amperage or the flow value and write it on the data sheet for step 23.

 S 866-112
 (38) Do these steps to put the airplane back to its initial condition:
 (a)  
Put the speed brake lever in the DOWN position.

 (b)  
Put the SPOILER A switch in the OFF position.

 S 796-113
 (39) Do these steps to find the null leakage of the power control unit for the aileron:
 (a)  Put the FLT CONTROLS A switch in the ON position.
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737-300/400/500MAINTENANCE MANUAL
 (b)  Read the amperage or the flow value and write it on the data sheet for step 24.
 S 796-114
 (40) Do these steps to find the leakage of the cylinder for the power control unit for the aileron:
 (a)  Turn the control wheel fully clockwise.
 (b)  Read the amperage or the flow value and write it on the data
 sheet for step 25.
 NOTE:____ If the leakage is more than the limit shown on the data
 sheet, move the control wheel to its center position
 then back clockwise and measure the flow again.
 (c)  Move the control wheel to its center position.

 S 796-115
 (41) Do these steps to find the null leakage for the power control unit for the elevator:
 (a)  
Open the No. 3 isolation valve (in the tail compartment).

 (b)  
Read the amperage or the flow value and write it on the data sheet for step 26.

 S 796-116
 (42) Do these steps to find the leakage of the autopilot actuators for the aileron and elevator:
 (a)  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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 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 A
 autopilot.
 (b)  Read the amperage or the flow value and write it on the data sheet for step 27.
 NOTE: If the leakage is more than the limit shown on the data
____
 sheet, refer to Procedure 4A or 4B.

 (c)  Put the A/P ENGAGE switch for system A in the OFF position.
 S 796-117
 (43) Do these steps to find the leakage of the cylinder for the power control unit for the elevator:
 (a)  
Pull the control column fully aft.

 (b)  
Read the amperage or the flow value and write it on the data sheet for step 28.

 NOTE: If the leakage is more than the limit shown on the data
____ sheet, move the control column to its center position then back aft and measure the flow again.
 (c)  Put the control column in its center position.
 S 796-118
 (44) Do these steps to find the null leakage of the power control unit for the rudder:
 (a)  
Open the No. 2 isolation valve (in the tail compartment).

 (b)  
Read the amperage or the flow value and write it on the data sheet for step 29.

 S 796-119
 (45) Do these steps to find the leakage of the cylinder for the power control unit for the rudder:
　
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