36-19-15
 ALL  ú
 ú  01  Page 508
 ú  Jul 15/96 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
C46493
A
737-300/400/500MAINTENANCE MANUAL
 S 865-027
 (20)
 Use the APU to supply pneumatic pressure to the system to do a leak check (AMM 36-05-00/201).

 S 795-012

 (21)
 Examine the couplings for leaks when the installation is complete.

 (a)  
Diffused leakage is permitted.

 (b)  
Concentration leakage must be repaired.

 NOTE: Concentration leakage is leakage which you can feel
____ with your hand at a distance of 12 inches.
 S 865-013
 (22)
 Remove the pressure from the pneumatic system (AMM 36-05-00/201).

 S 435-014

 (23)
 Install the bolts for the boot assembly to the pan assembly at the aft pressure bulkhead.

 S 435-020

 (24)
 Install the coupling at the boot assembly.

 (a)  Tighten clamp nut to the applicable torque value listed, above the minimum self-locking torque for the applicable ducts: 1) 10-12 inch-pounds for APU duct P/N 69-38626-1 2) 18-22 inch-pounds for APU duct P/N 69-38626-4
 S 435-015
 (25) Make sure all the ducts and couplings are secured.
 D. Put the Airplane to Its Usual Condition
 S 415-018
 (1)  
Close the stabilizer trim access door, 3701L.

 S 435-016

 (2)  
Install the floor panels at the aft passenger cabin (AMM
 53-21-00/401).

 (3)
Install the lavatory or galley compartment, if it was removed.

 S 435-017
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 36-19-15
 ALL  ú ú 01 Page 509 ú Jul 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 PNEUMATIC DUCT - INSPECTION/CHECK
_________________________________
 1.  General_______
 A.  This procedure contains two tasks. The first task does an inspection for interference condition between the leading edge TAI pneumatic duct and the fuel tube in the Engine No. 2 strut. The second task inspects for the titanium ducts which are touched by fire-resistant hydraulic fluid.
 TASK 36-19-15-206-021
 2.  Engine No. 2 Leading Edge TAI Pneumatic Duct/Fuel Tube Interference Check__________________________________________________________________________
 A.  Access
 (1)  
Location Zone
 402 Right Wing - Outboard Leading Edge

 (2)  
Access Panel
 6404R Leading Edge Access Panel Removable

 B.  Procedure
 S 016-016
 (1)  
Open the No. 2 engine leading edge access panel, 6404R.

 S 216-017

 (2)  
Examine the TAI pneumatic duct and fuel tube for evidence of chafing and fuel leakage.

 S 216-018

 (3)  
Measure the clearance between the fuel tube and the TAI pneumatic duct.

 (a)  
AIRPLANES POST-SB 28-1077; AIRPLANES PRE-SB 28-1084; Make sure the clearance is more than 0.10-inch.

 (b)  
AIRPLANES POST-SB 28-1084; Make sure the clearance is more than 0.50-inch.

 S 826-019
 (4)  If clearance is less than the specified limit, loosen the pneumatic duct clamps and adjust the pneumatic duct to the specified limit, then tighten the duct clamps.
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 36-19-15
 ALL  ú ú 02 Page 601 ú Jul 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 416-020
 (5) Close the No. 2 engine leading edge access panel, 6404R.
 TASK 36-19-15-206-001
 3.  Ducts Inspection________________
 A. General
 (1) Fire-resistant hydraulic fluid can contaminate titanium ducts.
 NOTE: Ducts that have been contaminated can be cleaned.
　
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