Installation of the Component Cooling Lines [PW11]

TASK 75-24-49-400-803-A
Installation of the Component Cooling Lines

WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

ZONE: 400

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

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	COVER - PROTECTION

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Component Cooling Hoses

3. Job Set-up
Subtask 75-24-49-941-064-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring (Ref. AMM TASK 71-00-00-860-833).

Subtask 75-24-49-010-076-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.

Subtask 75-24-49-040-062-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser for Ground Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Make sure that you did the deactivation of the thrust reverser for ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 75-24-49-010-077-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that the thrust reverser cowl-doors is open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR

4. Procedure

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 75-24-49-420-082-A ** ON A/C NOT FOR ALL

A. Installation of the Component Cooling Lines
(1) Install the Active Clearance Control (ACC) hose assembly (1).
(a) Remove the COVER - PROTECTION from the ACC hose assembly (1), ACC scoop and component-cooling tube assembly.

CAUTION: MAKE SURE THAT THE HOSE DOES NOT TWIST WHEN YOU INSTALL IT. IF THE HOSE TWISTS, THERE WILL BE PRELOAD ON THE HOSE. THIS CAN CAUSE CRACKS OR LEAKS IN THE HOSE.

(b) Attach the ACC hose assembly (1) to the ACC scoop and component-cooling tube assembly with the two clamps (2).
1 Make sure the flow arrow on the hose is in the correct direction

Component Cooling Hoses ** ON A/C NOT FOR ALL

(c) Make sure that the overlap between the ACC hose assembly (1) and the component-cooling tube assembly is a minimum of 1.13 in. (28.7 mm).
(d) Make sure that the overlap between the ACC hose assembly (1) and ACC scoop is a minimum of 1.13 in. (28.7 mm).
(e) Adjust the ACC hose assembly (1) to keep the preload to a minimum.
1 Make sure that there are no kinks in the hose.

CAUTION: DO NOT TIGHTEN THE HOSE CLAMPS TOO MUCH. IF YOU TIGHTEN THEM TOO MUCH, YOU CAN CAUSE DAMAGE TO THE HOSE CLAMPS OR THE INSULATION COVERS.

(f) Tighten the clamps (2) until they are snug. Do not tighten more than 18 lbf.in (0.20 m.daN).
(2) Install the Starter Air Valve (SAV) hose assembly (3).
(a) Remove the COVER - PROTECTION from the SAV hose assembly (3), component-cooling tube assembly and SAV.

CAUTION: MAKE SURE THAT THE HOSE DOES NOT TWIST WHEN YOU INSTALL IT. IF THE HOSE TWISTS, THERE WILL BE PRELOAD ON THE HOSE. THIS CAN CAUSE CRACKS OR LEAKS IN THE HOSE.

(b) Attach the SAV hose assembly (3) to the SAV and component-cooling tube assembly with the two clamps (4).
1 Make sure the flow arrow on the hose is in the correct direction

Component Cooling Hoses ** ON A/C NOT FOR ALL

(c) Make sure that the overlap between the SAV hose assembly (3) and component-cooling tube assembly is a minimum of 1.00 in. (25.4 mm).
(d) Make sure that the overlap between the SAV hose assembly (3) and the SAV is a minimum of 0.875 in. (22.2 mm).
(e) Adjust the SAV hose assembly (3) to keep the preload to a minimum.
1 Make sure that there are no kinks in the hose.

CAUTION: DO NOT TIGHTEN THE HOSE CLAMPS TOO MUCH. IF YOU TIGHTEN THEM TOO MUCH, YOU CAN CAUSE DAMAGE TO THE HOSE CLAMPS OR THE INSULATION COVERS.

(f) Tighten the clamps (4) until they are snug. Do not tighten more than 18 lbf.in (0.20 m.daN).
(3) Install the flow-divider-valve hose assembly (5).
(a) Remove the COVER - PROTECTION from the flow-divider-valve hose assembly (5), component-cooling tube assembly and flow divider valve.

CAUTION: MAKE SURE THAT THE HOSE DOES NOT TWIST WHEN YOU INSTALL IT. IF THE HOSE TWISTS, THERE WILL BE PRELOAD ON THE HOSE. THIS CAN CAUSE CRACKS OR LEAKS IN THE HOSE.

(b) Attach the flow-divider-valve hose assembly (5) to the flow divider valve and component cooling tube assembly with the two clamps (6).
1 Make sure the flow arrow on the hose is in the correct direction

Component Cooling Hoses ** ON A/C NOT FOR ALL

(c) Make sure that the overlap between the flow-divider-valve hose assembly (5) and component-cooling tube assembly is a minimum of 1.00 in. (25.4 mm).
(d) Make sure that the overlap between the flow-divider-valve hose assembly (5) and the flow divider valve is a minimum of 1.00 in. (25.4 mm).
Adjust the flow-divider-valve hose assembly (5) to keep the preload to a minimum.
1 Make sure that there are no kinks in the hose.

CAUTION: DO NOT TIGHTEN THE HOSE CLAMPS TOO MUCH. IF YOU TIGHTEN THEM TOO MUCH, YOU CAN CAUSE DAMAGE TO THE HOSE CLAMPS OR THE INSULATION COVERS.

(e) Tighten the clamps (6) until they are snug. Do not tighten more than 18 lbf.in (0.20 m.daN).

5. Close-up
Subtask 75-24-49-010-078-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR

Subtask 75-24-49-440-055-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser after ground maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 75-24-49-010-079-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl-doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:13:05 UTC