to extend the flaps.
 a) Extend the flaps until the dimension X is 25.52 to

 25.68 inches more than the dimension X1 (This is the 25-unit position).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A 737-300/400/500MAINTENANCE MANUAL
 b) Release the ALTERNATE FLAP control switch.
 c) Put the ALTERNATE FLAP arm switch in the OFF position.
 (c)  Remove the four bolts that attach the flap position transmitter
 to the gearbox (Fig. 506).
 (d)  Remove the transmitter from the gearbox.
 (e)  Turn the input shaft of the position transmitter clockwise
 until the red indicator lever on the bypass valve moves to the
 position 2.
 (f)  Make sure the angle between the pointers on the flap position
 indicator is 8 to 20 degrees (a chordal dimension of 0.08 to
 0.21 inch) (Fig. 507).
 (g)  Turn the input shaft of the position transmitter
 counterclockwise until the red indicator lever on the bypass
 valve moves to the position 1.
 (h)  Make sure the angle between the pointers on the flap position
 indicator is 5 to 17 degrees (a chordal dimension of 0.05 to
 0.18 inch).
 NOTE: The pointer must move a minimum of 3 degrees before the____
 indicator on the bypass valve moves.
 (i)  Turn the input shaft of the position transmitter
 counterclockwise until the red indicator lever on the bypass
 valve moves to the position 2.
 (j)  Make sure the angle between the pointers on the flap position
 indicator is 8 to 20 degrees (a chordal dimension of 0.08 to
 0.21 inch).
 (k)  Turn the input shaft of the position transmitter clockwise
 until the red indicator lever on the bypass valve moves to the
 position 1.
 (l)  Make sure the angle between the pointers on the flap position
 indicator is 5 to 17 degrees (a chordal dimension of 0.05 to
 0.18 inch).
 NOTE: The pointer must move a minimum of 3 degrees before the____
 indicator on the bypass valve moves.
 (m)  Turn the input shaft of the position transmitter clockwise
 until the left pointer on the position indicator aligns with
 the right pointer.
 NOTE: When you turn the input shaft clockwise, the pointer____
 should move towards the UP position. If the pointer
 moves to the 40-unit position, turn the input shaft
 clockwise until the left pointer aligns with the right
 pointer.
 Lightly hit the position indicator with your finger to
 remove the friction error.

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A
737-300/400/500MAINTENANCE MANUAL
 (n)  Install the left flap position transmitter (Fig. 506): 1) Apply a layer of the grease to the splines on the input
 shaft. 2) Put the transmitter in its position on the gearbox.
 NOTE: Make sure the two pointers stay aligned.
____
 3) Apply a layer of the primer to the bolts and washers. 4) With the primer wet, install the bolts and washers to attach the transmitter to the gearbox.
 5)  Make sure the bonding resistance between the transmitter and the gearbox is not more than 0.0025 ohm (SWPM 20-20-00).
 S 725-072
 (6)
Do the test again with the right asymmetry shutoff system.

 E.  
Put the Airplane Back to Its Usual Condition

 S 865-073
 (1)
Remove the system B hydraulic power (AMM 27-51-00/201).

 S 865-074

 (2)  
Remove the electrical power (AMM 24-22-00/201).

 TASK 27-51-00-715-075
 6.  Operational Test - Flap Asymmetry System (Fig. 507)
________________________________________
 A.  References
 (1)  
　
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