S 046-010

 (6)  
Do the deactivation procedure for the drive system of the trailing edge flaps (AMM 27-51-00/201).

 E.
Procedure

 S 486-018
 (1)  Do the steps that follow to install the lever and clamp tool on the applicable ballscrew:
 NOTE: The lever and clamp tool is part of the C27030-33 tool.
____ The lever and clamp tool is a one piece tool. There is an adjustment screw which connect the clamp and the lever together. This screw can be loosened to adjust the two tools so the load noses fit correctly on the ballscrew.
 (a)  With a rag, clean the oil and the dirt from the surface of the ballscrew where the clamp of the lever and clamp tool will be attached.
 NOTE: If it is necessary, you can put a mild solvent on
____
 the rag.

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737-300/400/500MAINTENANCE MANUAL
 (b)  Attach the lever and clamp tool on the ballscrew, aft of the ballnut. 1) Move the lever and clamp along the ballscrew until the load
 noses of the tool touch the aft end of the ball nut.
 NOTE: Make sure the load noses of the tool are set so
____ that the handles of the tool are approximately in line with the ball nut trunnions.
 2) Tighten the clamp to 200-300 pound inches.
 NOTE: Make sure the handles of the lever assembly are
____
 in the relaxed position.

 S 486-019
 (2)  
Install the dial indicator forward of the ball nut so that the extension of the indicator touches the forward end of the ball nut.

 (a)  
Put the dial indicator to zero.

 S 866-014
 (3)  
Move the handles of the lever tool together until the movement on the dial indicator stops.

 (a)  
Make sure the lever and clamp tool do not move along the length of the ballscrew when you move the handles together. 1) If the lever and clamp tool move, do the steps again to

 install the lever and clamp tool.
 NOTE: It can be necessary to use a higher torque value
____ if the tool moves but do not use a torque greater 300 pound inches.
 (b) Write down the value which is shown on the dial indicator.
 NOTE: The value shown on the dial indicator is the value
____
 for the backlash of the ballscrew.

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 (c)  Do these steps a total of five times to make sure the dial indicator movement is repeatable and consistent.
 S 416-015
 (4)  
If the backlash value is more than 0.0095 inches for Thomson Saginaw or Beaver Precision ballscrews, or more than 0.0057 inches for Umbra Cuscinetti ballscrews, install a new ballscrew (AMM 27-51-73/401).

 S 086-016

 (5)  
Remove the lever and clamp tool from the ballscrew.

 S 086-017

 (6)  
Remove the dial indicator from the ballscrew.

 F.
Put the Airplane Back to Its Usual Condition.

 S 446-020
 (1)  
Do the Activation procedure for the drive system for the trailing edge flaps (AMM 27-51-00/201).

 S 416-021

 (2)  
Do the applicable steps that follow to close the access for the ballscrews:

 (a)  
At the positions NO. 1, No. 2, No. 7 or No.8, install the center fairing (AMM 27-51-52/401).

 (b)  
At the No. 3 or No. 6 position, install the tailcone assembly (AMM 27-51-32/401).

 (c)  
At the No. 4 or No. 5 positions, install the fairing for the inboard track of the inboard flap (AMM 27-51-32/401).

 S 866-022
 (3)  Remove the electrical power if it is not necessary
 (AMM 24-22-00/201).

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