(3)
Connect the service interphone to the aircraft (Ref. TASK 23-44-00-860-001).
Subtask 49-20-00-865-081
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
R EFF : 001-049, 101-105, 107-107, 151-199, 49-20-00Page 702 201-210, Config-2 Aug 01/05
CES Subtask 49-20-00-010-065
C. Get Access
(1)
Put the access platform below the APU access doors 316AR and 315AL.
(2)
Open the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-010-001).
(3)
Set the LIGHT SW 11LJ to the ON position.
4. Procedure
_________ Subtask 49-20-00-020-059
A. Disconnect the Bleed Air Duct (3).
(Ref. Fig. 701/TASK 49-20-00-991-012)
(1)
Remove the clamp (2).
(2)
Install the blanking plug on the bleed air duct (3). NOTE : Do not cover the flange of the APU load control valve (1).
____
(3)
Disconnect the electrical connector P12 from the Load Control Valve.
(4)
Put blanking caps on the disconnected electrical connectors. Subtask 49-20-00-100-058
B.
Preparation and Cleaning
(Ref. Fig. 702/TASK 49-20-00-991-013)
(1)
Install the DEVICE - CLEANING, APU to the APU with the mount assembly.
(a)
Install the mounting plate (14) on the APU rear lower mount boss with the knurled screw (15).
(b)
Attach the tube support assembly (16) to the mount plate (14) with the knurled screws (17).
(c)
Attach the sprayer unit (23) to the support assembly (16) with the clamp plate (22). Install the screws (18), washers (19) and
(21) and nuts (20).
(2)
Adjust the spray nozzles to spray into the power section compressor and the load compressor.
R EFF : 001-049, 101-105, 107-107, 151-199, 49-20-00Page 703 201-210, Config-2 Aug 01/05
CES
Bleed Air Duct - APU
Figure 701/TASK 49-20-00-991-012
CES
Cleaning Device
Figure 702/TASK 49-20-00-991-013
CES
(3) Make sure that the spray nozzle assembly is correctly installed and tightened.
WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL
_______ MATERIALS ONLY WITH A GOOD SUPPLY OF AIR. OBEY THE MANUFACTURERS INSTRUCTIONS. PUT ON PROTECTIVE CLOTHING. DO NOT GET THEM IN YOUR MOUTH. DO NOT SMOKE. DO NOT BREATHE THE GAS. THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.
WARNING : OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE THE
_______
SPECIAL MATERIAL.
THIS MATERIAL IS DANGEROUS.
WARNING : USE A PROTECTIVE EYE SHIELD/GOGGLES WHEN YOU USE COMPRESSED
_______ AIR. DEBRIS AND/OR HIGH PRESSURE AIR CAN DAMAGE YOUR EYES.
(4) Prepare 18.0 l (4.7550 USgal) of the compressor wash-cleaner solution.
(a)
Mix 12.0 l (3.1700 USgal) of the de-mineralized water and 6.0 l (1.5850 USgal) of the solvent CLEANING AGENTS (Material No. 11-013) to make the cleaner solution.
(b)
Fill the container of the compressor cleaning device with 9.0 l (2.3775 USgal) of the cleaner solution.
(c)
Close the container and make sure that it is correctly sealed.
(d)
Operate the handpump on the compressor cleaning device and pressurize the container to 5 bar (72.5188 psi).
CAUTION : MAKE SURE THAT YOU HAVE THE CORRECT FIRE FIGHTING
_______ EQUIPMENT AVAILABLE. THE APU FIRE EXTINGUISHING SYSTEM IS NOT SUFFICIENT TO EXTINGUISH A FIRE IF THE ACCESS DOORS 315AL AND 316AR ARE OPEN/ REMOVED. KEEP OPERATION OF THE APU TO A MINIMUM WHEN THE ACCESS DOORS ARE OPEN/REMOVED.
R EFF : 001-049, 101-105, 107-107, 151-199, 49-20-00Page 706 201-210, Config-2 Aug 01/05
CES (5) Start and operate the APU (Ref. TASK 49-00-00-860-008).
NOTE : APU run with open doors:
____
-
make sure that the access platform can not move.
-
make sure that the fire fighting equipment and the neccesary persons to monitor the start and operation of the APU are available.
-
make sure that no persons or loose equipment are in the danger areas.
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