(2)  
Access Panels
 511KT
 521AB
 521UBX
 522JL
 522BL
 611KT
 621AB
 621UBX
 622JR
 622BR

 D. Procedure - Install the Upper Telescoping Duct (Fig. 401)
 S 034-022
 (1)  
Remove the end cap, packing, seal, and the backup rings from upper telescoping duct (View D).

 (2)  
Apply the lubricant to the seal.

 S 434-024

 (3)  
Move the end cap, packing, backup ring, seal, and the backup ring (in that order) on the lower telescoping duct.

 S 644-023
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MAINTENANCE MANUAL

 S 644-025
 (4)  
Apply the lubricant to the O-rings and install them in the upper telescoping duct (View D).

 S 434-026

 (5)
Assemble the bearings, end duct, packing, and the flange on the upper telescoping duct. Put them in position in the wing.

 S 824-027

 (6)  
Move the wing TAI valve duct and the TAI valve outboard in the upper telescoping duct.

 S 034-028

 (7)  
Install the bolts that connect the upper telescoping duct and the TAI valve duct to the ribs. Do not tighten the bolts.

 S 824-029

 (8)  
Align the telescoping duct and bearings so the duct can rotate without binding. Tighten the bolts and monitor the duct as you tighten the bolts to make sure the duct does not bind.

 S 434-030

 (9)  
Install the clamp that supports the TAI valve duct (View B).

 S 424-031

 (10)
 Install the TAI duct section that is inboard of the duct section that is connected to the wing TAI valve (Ref. 36-11-01).

 S 434-032

 (11)
 Connect the jumper cable and electrical connector to the TAI valve.

 E. Procedure - Install the Lower Telescoping Duct (Fig. 401).
 S 424-033
 (1) Insert the lower telescoping duct into the upper telescoping duct.
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