ECS - Component Location
Figure 204/TASK 21-00-00-991-005
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ECS - Component Location
Figure 204A/TASK 21-00-00-991-005-A
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**ON A/C ALL
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remove the nuts (12), the washers (11) and,
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remove the access cover (10) and the gasket (9) from the air plenum chamber (8).
4. Procedure
_________ Subtask 21-00-00-200-050
A. Visual Inspection
(1)
Use a mirror and a torch and do a check for contamination of:
(a)
The inner part of the air plenum chamber (1),
(b)
The ram-air inlet (13) and,
(c)
The main heat exchanger (5).
(2)
If there is too much contamination, remove the contaminated components.
Subtask 21-00-00-010-056
B. Removal of the Contaminated Components
(1)
Remove the heat exchanger unit (Ref. TASK 21-52-24-000-001).
(2)
Remove the screws (2) and washers (3) and remove the plenum (1) from the primary heat exchanger (4).
(3)
Remove the screws (7) and the washers (6) and disconnect the primary heat exchanger (4) from the main heat exchanger (5).
Subtask 21-00-00-160-064
C. Cleaning of the Contaminated Components WARNING : OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE THIS/THESE
_______ MATERIAL/S. USE PROTECTIVE CLOTHING, RUBBER GLOVES AND GOGGLES.
(1) Clean the ram air inlet, the ram air outlet and the air plenum chamber (8) with a soft bristle brush and CLEANING AGENTS (Material No. 11-001K).
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(2)
Do a check of the ram air actuators for contamination. If there is contamination, do this cleaning procedure:
(a)
Use a lint-free cloth or a soft bristle brush moist with CLEANING AGENTS (Material No. 11-006) and clean the outer parts of the actuators.
(b)
Dry the parts with a dry lint-free cloth or low-pressure compressed air (less than 50psi).
(3)
Do a check for contamination of the inner ducts of the heat exchangers. If they are contaminated, it is necessary to clean all the component parts of the air-packs (Ref. TASK 21-00-00-100-001).
(4)
Clean the cooling ribs of the heat exchangers (Ref. CMM 215211) or (Ref. CMM 215212).
(5)
Clean the glass-fiber plenum:
(a)
Use a soft bristle brush and soap water solution to clean the glass-fiber and rubber parts of the plenum.
(b)
Use a lint-free cloth or clean dry compressed air to dry the parts.
(c)
Make sure that the rubber seals are not damaged and that the glass-fiber material is rigid and hard. If the seals are damaged or the plenum is flexible and soft, change the plenum (Ref. CMM 215207).
Subtask 21-00-00-410-055
D. Installation of the Clean Components
(1)
Put the primary heat exchanger (4) in position on the main heat exchanger (5) and install the washers (6) and the screws (7).
(2)
Put the plenum (1) in position on the primary heat exchanger (4) and install the washers (3) and screws (2).
(3)
Install the heat exchanger unit (Ref. TASK 21-52-24-400-001).
(4)
Put the gasket (9) and the access cover (10) in position on the air plenum chamber (8) and install the washers (11) and the nuts (12).
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5. Close-up
________ Subtask 21-00-00-410-054
A. Close Access
(1)
Install the access panels 191BB, 192FB, 191KB and 192KB (Ref. TASK 53-35-13-400-002).
(2)
Make sure that the work area is clean and clear of tool(s) and other items.
(3) Remove the warning notice(s). Subtask 21-00-00-862-054
B. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
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