Cleaning of Special Components in the Environmental Control System (ECS)

TASK 21-00-00-100-001-A
Cleaning of Special Components in the Environmental Control System (ECS)

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	BRUSH - BRISTLED, SOFT

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08ABC1)	Aqueous Cleaner-Aircraft Exterior Pressure Spraying -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Referenced Information

REFERENCE	DESIGNATION
TASK 21-51-41-000-001-A	Removal of the Ozone Filter
TASK 21-51-41-400-001-A	Installation of the Ozone Filter
TASK 21-52-23-000-001-A	Removal of the Pipe Assembly between the Main Heat Exchanger and the Air Cycle Machine
TASK 21-52-23-400-001-A	Installation of the Pipe Assembly between the Main Heat Exchanger and the Air Cycle Machine
TASK 21-52-25-000-001-A	Removal of the Primary Heat Exchanger
TASK 21-52-25-400-001-A	Installation of the Primary Heat Exchanger
TASK 21-52-26-000-001-A	Removal of the Main Heat Exchanger
TASK 21-52-26-400-001-A	Installation of the Main Heat Exchanger
TASK 21-52-31-000-001-A	Removal of the Reheater
TASK 21-52-31-400-001-A	Installation of the Reheater
TASK 21-52-32-000-001-A	Removal of the Condenser
TASK 21-52-32-400-001-A	Installation of the Condenser
TASK 21-52-43-000-001-A	Removal of the Pack Downstream Check-Valves
TASK 21-52-43-400-001-A	Installation of the Pack Downstream Check-Valves
TASK 21-61-41-000-002-A	Removal of the Anti-Ice Valve Sense-Lines Assembly
TASK 21-61-41-400-002-A	Installation of the Anti-Ice Valve Sense-Lines Assembly
TASK 21-63-52-000-001-A	Removal of the Pressure Regulating Valve
TASK 21-63-52-400-001-A	Installation of the Pressure Regulating Valve

3. Job Set-up
Subtask 21-00-00-010-054-A

A. Not Applicable

4. Procedure
Subtask 21-00-00-160-062-B

A. Special Cleaning of ECS Components
(1) As necessary:
(a) Clean the Reheaters 10HM3 and 11HM3
1 Remove the reheaters (Ref. AMM TASK 21-52-31-000-001).
2 To clean the reheaters, send them to the workshop.
3 Install the reheaters (Ref. AMM TASK 21-52-31-400-001).
(b) Clean the Ozone Filters 100HM and 101HM
1 Remove the ozone filters (Ref. AMM TASK 21-51-41-000-001).
2 To clean the ozone filters, send them to the workshop.
3 Install the ozone filters (Ref. AMM TASK 21-51-41-400-001).
(c) Clean the Primary Heat Exchangers 10HM6 and 11HM6
1 Remove the primary heat exchangers (Ref. AMM TASK 21-52-25-000-001).
2 To clean the primary heat exchangers, send them to the workshop.
3 Install the primary heat exchangers (Ref. AMM TASK 21-52-25-400-001).
(d) Clean the Main Heat Exchangers 10HM7 and 11HM7
1 Remove the main heat exchangers (Ref. AMM TASK 21-52-26-000-001).
2 To clean the main heat exchangers, send them to the workshop.
3 Install the main heat exchangers (Ref. AMM TASK 21-52-26-400-001).
(e) Clean the Condensers 10HM2 and 11HM2
1 Remove the condensers (Ref. AMM TASK 21-52-32-000-001).
2 To clean the condensers, send them to the workshop.
3 Install the condensers (Ref. AMM TASK 21-52-32-400-001).

Subtask 21-00-00-110-052-A ** ON A/C NOT FOR ALL

B. Cleaning of ECS Components
(1) As necessary:
(a) At the anti-ice valves 17HH and 37HH:
1 Remove the sense lines (Ref. AMM TASK 21-61-41-000-002).

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

2 Cleaning of the Sense Lines

Clean the sense lines with Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) .

3 Install the sense lines (Ref. AMM TASK 21-61-41-400-002).
(b) At the air conditioning packs 10HM and 11HM:
1 Remove the pipe assemblies (Ref. AMM TASK 21-52-23-000-001).

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

2 Cleaning of the Pipe Assemblies

Clean the pipe assemblies with a Textile-Lint free Cotton - (Material No.14SBA1) and Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) .

3 Install the pipe assemblies (Ref. AMM TASK 21-52-23-400-001).

Subtask 21-00-00-110-052-B ** ON A/C NOT FOR ALL

B. Cleaning of ECS Components
(1) As necessary:
(a) At the air conditioning packs 10HM and 11HM:
1 Remove the pipe assemblies (Ref. AMM TASK 21-52-23-000-001).

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

2 Cleaning of the Pipe Assemblies

Clean the pipe assemblies with a Textile-Lint free Cotton - (Material No.14SBA1) and Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) .

3 Install the pipe assemblies (Ref. AMM TASK 21-52-23-400-001).

Subtask 21-00-00-160-063-A

C. Special Cleaning of ECS Components
(1) As necessary:
(a) In the pack downstream system:
1 Remove the check valves 15HM and 16HM (Ref. AMM TASK 21-52-43-000-001).

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

2 Cleaning of the Check Valves

clean the check valves with a BRUSH - BRISTLED, SOFT and Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) .
dry the check valves sufficiently with a Textile-Lint free Cotton - (Material No.14SBA1) or with dry compressed air.

3 Install the check valves 15HM and 16HM (Ref. AMM TASK 21-52-43-400-001).
(b) In the bleed air system:
1 Remove the pressure regulating valve 14HK (Ref. AMM TASK 21-63-52-000-001).
2 To clean the pressure regulating valve, send it to the workshop.
3 Install the pressure regulating valve 14HK (Ref. AMM TASK 21-63-52-400-001).

[Rev.10 from 2021] 2026.03.31 23:00:34 UTC