(b)  
Open the APU cowl door.

 (c)  
Connect the door support rods.

 S 017-015
 CAUTION:_______BE CAREFUL WHEN YOU MOVE THE LOWER SHROUD. DAMAGE TO THE SHROUD DRAIN LINES CAN OCCUR.
 (3)  Remove the lower shroud:
 (a)  
Hold the lower shroud and open the shroud latches.

 (b)  
Remove the lower shroud.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
APU COWL DOOR 
DRAIN SEAL PLATES 
SEE  A 
SEE  B 
SEE  C 
TO DRAIN MAST 
DRAIN LINE  LOWER SHROUD  A  DRAIN HOLES FOR THE ACCESS DOOR (NOT SHOWN) 
DRAIN FITTING 
B 
DRAIN LINES 
LOWER SHROUD  STAND PIPE 
SHROUD DRAIN RESERVOIR DRAIN  DRAIN CUP DRAIN LINE 
SEE  D DRAIN CUP 
C  Figure 701 APU Drains Cleaning  D 

A09671
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 167-004
 (4)  Blow the air through the drain tube of the exhaust duct, the aft
 drain cup and the forward drain cup.
 NOTE:____ You must remove the cover for the forward drain cup to
 clean the cup.
 (a)  Make sure the air flows through the aft drain fitting on the
 lower shroud.
 S 217-005
 (5)  Make sure the internal area of the drain cups has no deterioration
 because of corrosion or because of erosion (AMM 49-16-11/601).
 S 167-006
 (6)  Blow the air through the shroud drain.
 (a)  Make sure the air flows through the forward drain fitting on
 the lower shroud.
 S 117-017

 WARNING: 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.
 (7) If some oil is on the lower shroud, clean the lower shroud:
 (a)
Clean the lower shroud with the solvent.

 (b)
Dry the surface of the lower shroud with the air.

 S 167-007
 (8) Blow the air through the seal plate fittings.
 (a) Make sure the air flows through the APU drain mast.
 S 167-008
 (9)  Blow the air through the two drain holes in the forward end of the APU cowl door.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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S 117-019
 WARNING: 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) Clean the drain mast and the APU cowl door:
 (a)  
Clean the drain mast and the APU cowl door with the solvent.

 (b)  
Dry the drain mast and the APU cowl door with the air.

 S 417-010
　
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