(a)  
Remove the bearing mounting bolts and the bearings on each side of the inner duct.

 (b)  
Lower the inner duct until it is clear of the structure and remove the inner duct from the outer duct.

 S 034-021
 (17) For the duct at slat 1 or 6:
 (a)  
Remove the duct mounting bolts and bearings on the inboard side of the inner duct.

 (b)  
Lower the inner duct until it is clear of the structure and remove it.

 NOTE: If there is not sufficient clearance between angle
____ details of the leading edge to remove the duct, do a modification of the leading edge angles (AMM 27-81-21/401).
 S 034-022
 (18) Remove the O-rings from the T of the inner duct.
 TASK 30-11-31-404-002
 3. Telescoping Duct Installation (Fig. 401)
_____________________________
 A. Consumable Materials
 (1)  
C00432, Primer - BMS 10-11 Type 1 (AMM 20-30-41/201)

 (2)  
A000247, BMS 5-95

 (3)  
A000474, Sealent Dow Corning 93-006

 B. References
 (1)  
AMM 12-30-00/201, Wing Lower Surface Access Panels

 (2)  
AMM 27-81-00/201, Leading Edge Flap and Slat Control System

 (3)  
AMM 27-81-21/401, Leading Edge Slats

 (4)  
AMM 54-32-01/401, Forward Fairing

 C. Access
 (1)  Location Zones
 302 Left Wing Outboard Leading Edge
 402 Right Wing Outboard Leading Edge

 D. Procedure
 S 434-023
 (1) Install O-rings for the supply duct on the T of the inner duct.
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 ALL  ú ú 01 Page 407 ú Mar 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 224-055
 CAUTION:_______ ANY EXCESSIVE LOOSENESS OR MISALIGNMENT OF THE "T" DUCT CAN RESULT
 IN HIGH WEAR RATES IN THE DUCT BEARINGS.  WITH ALL DUCTS ADJUSTED
 AND JOINTS TORQUED, INSPECT FOR GAPS BETWEEN THE DUCT MOUNTING

 FLANGE AND THE DUCT BEARING.
 (2)  
If the combined gap of both duct bearings exceed +0.03 inch then reference figure 401 sheet 3.

 S 434-024

 (3)  
Set the T of the inner duct in the leading edge and install the duct bearings.

 S 434-025
 CAUTION: FOR SLATS 2, 3, 4 AND 5, INSTALL THE DOWNLOCK HARNESS AND
_______ CLAMPS FOR THE SLAT ACTUATOR SO THEY DO NOT TOUCH THE TELESCOPING DUCT (REF FIG. 402). IF THE HARNESS AND CLAMPS ARE NOT IN THE CORRECT POSITION, RUB OR WEAR DAMAGE CAN OCCUR.
 (4)  
Set the supply duct sections in position at the telescoping duct.

 S 434-027

 (5)  
Connect the the duct connection and the support clamps.

 S 434-028

 (6)  
For the duct at slat 1 or 6:

 (a)  
Install the seal in the end of the outer duct.

 (b)  
Put the outer duct assembly over the inner duct.

 (c)  
Tighten the cap nut to 250 to 370 pound-inches.

 S 434-029
 (7)  
Put the bearings on each end of the T-section of the outer duct.

 S 434-030

 (8)  
Put the outer duct assembly into the support bracket for the inner slat.

 S 434-031

 (9)  
Install the slat spray duct from each end of the slat.

 S 434-032

 (10)
 Install the retaining bolts for the spray duct (2 places) at each end of the slat.

 (11)
 Install the blade seal.

 S 434-033
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 30-11-31
 ALL  ú ú 01 Page 408 ú Jul 15/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 414-034
 (12)
 Install the access panel.

 S 414-035

 (13)
 For the duct at slat 2, 3, 4 or 5:

 (a)
　
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