-
make sure that persons are not in the APU compartment or on the access platform below the APU during start, mode change (MES on/off, de-ice on/off, ECS demand change, APU Gen. on/off) and/or shutdown.

 (6)
 Do a print-out of the APU MES/IDLE REPORT (Ref. TASK 31-36-00-740-010).

 (7)
 Spray the cleaner fluid into the APU compressor until the compressor cleaning device is empty.

 NOTE : Keep the pressure in the compressor cleaning device to
____ approximately 5 bar (72.5188 psi). Use a handpump to do this.
 (8)
 Operate the APU for 2 minutes with no cleaner fluid in the APU
 compressor.

 (9)
 Make sure that the pressure is released from the compressor cleaning device before the container is opened.

 (10)
 Fill the compressor-cleaning device container with 9.0 l (2.3775 USgal) of the cleaner solution.

 (11)
 Close the container and make sure that it is correctly sealed.

 (12)
 Operate the handpump on the compressor cleaning device and pressurize the container to 5 bar (72.5188 psi).

 (13)
 Spray the cleaner solution into the APU compressors for a second time until the cleaning device is empty.

 NOTE : Keep the pressure in the compressor cleaning device to
____ approximately 5 bar (72.5188 psi). Use a handpump to do this.
 (14) Operate the APU for 10 minutes more to make sure that the bleed components are dry.

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 CES

 (15)
 Do a print-out of the APU MES/IDLE REPORT (Ref. TASK 31-36-00-740-010).

 (16)
 Stop the APU (Ref. TASK 49-00-00-860-009).

 (17)
 Compare the EGT and OAT figures before and after the compressor cleaning.

 (a)
 Make sure that there has been an improvement in engine performance.

 (b)
 If the results are unsatisfactory do the compressor cleaning procedure again.

 (18)
 Open, safety and tag this(these) circuit breaker(s):
 1KD, 2KD.

 (19)
 Remove the cleaning device

 (a)
 Remove the knurled screws (17) and remove the cleaning device.

 (b)
 Remove the knurled screw (15) and the mount plate (14) from the rear lower mount boss.

 Subtask 49-20-00-420-054
 C. Connection of the Bleed air Duct
 (1)
 Remove the blanking plug from the bleed air duct (3).

 (2)
 Make sure that the bleed air duct (3) is clean and dry.

 (3)
 Connect the bleed air duct (3) to the load control valve (1) with the clamp (2).

 CAUTION : DO NOT TORQUE THE V-CLAMP(S) TO MORE THAN THE SPECIFIED
_______ VALUE. YOU CAN DAMAGE THE FLANGE SURFACES IF YOU DO.
 (4)
 TORQUE the clamp (2) to 0.56 m.daN (49.55 lbf.in).

 (5)
 Remove the blanking caps and connect the electrical connector P12 to the Load Control Valve.

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 CES  5. Close-up

________ Subtask 49-20-00-410-067
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Set the LIGHT SW 11LJ to the OFF position.

 (3)
 Close the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-410-001).

 (4)
 Remove the access platform(s). Subtask 49-20-00-865-082

 B.
 Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
 Subtask 49-20-00-860-072
 C. Aircraft Maintenance Configuration
 (1)
 Pressurize the reservoirs of the hydraulic systems.
 (Ref. TASK 29-00-00-864-001)

 (2)
 Energize the ground service network
 (Ref. TASK 24-41-00-861-002)

 (3)
 Remove the warning notice(s).

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 CES  ENGINE ((APS 3200)) - CLEANING/PAINTING

_______________________________________
 TASK 49-20-00-100-003
 APU Compressor Cleaning (APS 3200)
　
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