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 C.  The compressor discharge T-fitting is on the aft end of the APU. You can get access to the fitting through the APU cowl door.
 TASK 49-52-91-107-001
 2.  Clean the Compressor Discharge T-Fitting (Fig. 701)
________________________________________
 A.  Standard Tools and Equipment
 (1)  Compressed Air Source - 100 psig maximum
 B.  References
 (1)  AMM 49-11-00/201, APU Power Plant
 C.  Access
 (1)  
Location Zones
 101 Flight Compartment, LH
 205 Electronic Compartment
 703 APU Compartment

 (2)  
Access Panels
 1201 Electronic Equipment Access Door
 3804 APU Cowl Door

 

 D.  Procedure
 S 867-002
 (1)  Set the switch and the circuit breaker:
 (a)  
Set the APU master switch, on the P5 forward overhead panel, to the OFF position and attach a DO-NOT-OPERATE tag.

 (b)  
Open this circuit breaker and attach a DO-NOT-CLOSE tag: 1) E3-3 Electrical Shelf, APU Control Unit

 S 017-003
 (2)  Open the APU cowl door:
 (a)  Open the latches for the APU cowl door.
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////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////

Compressor Discharge Pressure Orificed Tee Cleaning
Figure 701 (Sheet 1)

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COMPRESSOR DISCHARGE T-FITTING
0.080
INCH
0.084
B
UPPER SHROUD
CONTROL
AIR LINE

FWD 3-WAY SOLENOID VALVE
C
Compressor Discharge Pressure Orificed Tee Cleaning Figure 701 (Sheet 2)
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////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
TO THE ACCELERATION 
LIMITER  PRESSURE LINE 
FOR THE 
SEE  D  COMPRESSOR 
DISCHARGE 

3-WAY SOLENOID VALVE  CONTROL AIR FOR THE PRESSURE LINE T-FITTING DISCHARGE COMPRESSOR SEE E  FOR THE PRESSURE LINE COMPRESSOR DISCHARGE 
LIMITER TO THE ACCELERATION SEE D 
DISCHARGE AIR) (COMPRESSOR CONTROL AIR LINE 
VALVE SOLENOID FUEL  SEE  F 

D
Compressor Discharge Pressure Orificed Tee Cleaning Figure 701 (Sheet 3)
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 ú ú 01 Page 704 ú Nov 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
COMPRESSOR DISCHARGE T-FITTING
0.080
INCH
0.084
E
UPPER SHROUD
CONTROL AIR LINE
3-WAY SOLENOID VALVE
FWD
F
Compressor Discharge Pressure Orificed Tee Cleaning Figure 701 (Sheet 4)
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 ú ú 01 Page 705 ú Jul 15/97
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