S 434-021
 (13)
 Attach the pushrods to the aftflap:

 (a)  
Install the bolts and washers to connect the pushrods to the leading edge of the aftflap.

 (b)  
Tighten the nuts and install the cotter pins.

 S 864-022
 (14)
 Do this task:  "Hydraulic System B Pressurization" (Ref 27-51-00/201).

 S 864-023

 (15)
 Put the flap control lever in the 40-unit detent to extend the flaps.

 S 864-024

 (16)
 Do this task:  "Hydraulic System B Depressurization" (Ref 27-51-00/201).

 (17)
 Install the trailing edge of the midflap.

 S 864-026

 (18)
 Do this task:  "Hydraulic System B Pressurization" (Ref 27-51-00/201).

 S 414-025
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 864-027
 (19)
 Put the flap control lever in the UP detent to retract the flaps.

 S 864-028

 (20)
 Do this task:  "Hydraulic System B Depressurization" (Ref 27-51-00/201).

 S 224-029

 (21)
 Make sure the clearance between the trailing edge of the midflap and the aftflap is 0.06 +0.09/-0.05 inch.

 (a)  
If the clearance is not in the tolerance, adjust the pushrods or replace the aftflap or the trailing edge of the midflap.

 (b)  
If you adjust the pushrods, make sure the aftflap and seal adjustments are in the limits.

 S 864-030
 (22)
 Do this task:  "Hydraulic System B Pressurization" (Ref 27-51-00/201).

 S 714-031

 (23)
 Extend and retract the flaps through one full cycle.

 (a)  
Make sure the aftflap moves freely.

 S 864-032
 (24) Do this task:  "Hydraulic System B Depressurization" (Ref 27-51-00/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 INBOARD AFTFLAP - INSPECTION/CHECK
__________________________________
 1.  General_______
 A.  There is one task in this procedure: an inspection of the inboard aftflap. To do the inspection you measure the diameters of the bushings and bolts that attach the bottom flight rollers to the aftflap.
 TASK 27-51-11-226-001
 2.  Inboard Aftflap Inspection__________________________
 A.  Standard Tools and Equipment
 (1)  
Micrometer - 0 to 1 inch

 B.  
References

 (1)  
27-51-11/401, Inboard Aftflap

 C.  
Access

 (1)  
Location Zone 309, 409 Wing Trailing Edge Flap and Spoilers

 D.  
Procedure

 S 026-002
 (1)
Do this task: "Inboard Aftflap Removal" (Ref 27-51-11/401).

 S 226-003

 (2)  
Measure the parts on the aftflap (Fig. 601):

 (a)  
Remove the parts.

 (b)  
Use a micrometer to measure the diameter of the parts.

 (c)  
Compare the dimensions you measured with the permitted dimensions shown in Fig. 601.

 (d)  
Replace the parts that are not in the tolerance.

 (e)  
Install the parts.

 (3)  
Do this task: "Inboard Aftflap Installation" (Ref 27-51-11/401).

 S 426-004
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