(c)  
Install the upper drain housing (9) to the turbine plenum boss.

 (d)  
Tighten the upper drain housing (9) to 270 pound-inches

 (30.5 newton-meters).
 S 216-027
 (9)  Do an inspection of the fuel drain:
 (a)  
Make sure the drain line has no carbon material or blockage.

 (b)  
Make sure the parts for the fuel drain housing have no carbon material.

 (c)  
Make sure the drain reducer on the combustion chamber cap has no carbon material or blockage.

 (d)  
Make sure the turbine plenum boss has no carbon material or
 blockage.

 S 106-028
 CAUTION: DO NOT GET THE SOLVENT IN YOUR MOUTH, OR YOUR EYES, OR ON YOUR
_______ SKIN. DO NOT BREATHE THE FUMES FROM THE SOLVENT. PUT ON A PROTECTIVE SPLASH GOGGLE AND GLOVE WHEN YOU USE THE SOLVENT. KEEP THE SOLVENT AWAY FROM SPARKS, FLAME, AND HEAT. THE SOLVENT IS A POISONOUS AND FLAMMABLE MATERIAL WHICH CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (10) If there is carbon material or blockage in the fuel drain, clean the applicable parts:
 (a)  
If the drain line has blockage, remove the blockage with the
 compressed air.

 (b)  
If the drain line has carbon material, clean the drain line
 with the solvent:
 1) Clean the drain line with the solvent.
 2) Dry the drain line with the compressed air.

 (c)  
If the parts for the fuel drain housing have carbon material, clean the parts of the fuel drain housing: 1) Clean the upper drain housing (9), spring (3), screen (4)

 and lower drain housing (5) with the solvent.
 2) Dry the parts with the compressed air.

 (d)  
If there is blockage in the drain reducer on the combustion chamber cap or in the turbine plenum boss, remove the blockage: 1) Remove the combustor unit (AMM 49-31-42/401). 2) Use the vacuum cleaner to remove the blockage from the

 inside of the combustion chamber cap or the turbine plenum.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 49-31-71
 ALL  ú ú 11 Page 606 ú Nov 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(e)  If there is carbon material in the drain reducer on the combustion chamber cap or in the turbine plenum boss, clean the drain reducer or turbine plenum boss: 1) If it is not already done, remove the combustor unit
 (AMM 49-31-42/401).
 2)  Clean the drain reducer and turbine plenum boss with the solvent. a) If you must disassemble the combustor unit to remove
 the carbon material, install a new combustor unit (AMM 49-31-42/401).
 (f)  If the combustor unit was removed, install the combustor unit (AMM 49-31-42/401).
 S 436-029
 (11) Install the fuel drain housing to the turbine plenum:
 (a)  
Put the screen (4) and spring (3) in the lower drain housing (5).

 (b)  
Install a new packing (2) on the lower drain housing (5).

 (c)  
Install the lower drain housing (5) to the upper drain housing

 (9) with the clamp (8).
 NOTE: Do not tighten the clamp at this time.
____
 (d)  Install the drain seal (6) to the lower drain housing (5).
 S 436-030
 (12) Install the drain line:
 (a)  
Apply a layer of the antiseize compound to the threads of the drain reducer, drain union and drain line.

 (b)  
Connect the drain line to the drain reducer on the combustion chamber cap.

 (c)  
Connect the drain line to the drain union (7) on the fuel drain housing.

 (d)  
Tighten the drain reducer, drain union and drain line to 270 pound-inches (30.5 newton-meters).

 S 426-048
 (13) Tighten the clamp (8) on the fuel drain housing until the lower drain housing (5) does not turn.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 49-31-71
 ALL  ú ú 10 Page 607 ú Nov 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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