Inspection of the Hight Pressure (HP) Bleed Control Air Tubes

TASK 36-11-47-200-010-A
Inspection of the Hight Pressure (HP) Bleed Control Air Tubes

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

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

1. Reason for the Job
This TASK gives the procedure for a general inspection of the HP bleed control air tubes.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	LIGHT SOURCE - INSPECTION
No specific	AR	MIRROR - INSPECTION
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-002)	cleaning fluid
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves
HP Bleed Control Air Tubes

3. Job Set-up
Subtask 36-11-47-861-050-A ** ON A/C NOT FOR ALL

A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

Subtask 36-11-47-941-050-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On the ENG panel 115VU:

Put a WARNING NOTICE(S) to tell persons not to start the engine.

(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes.
(3) On the ENG section of the panel 50VU:

Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off,
Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 36-11-47-010-050-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 1M(3 FT) in position below the engine.

Subtask 36-11-47-040-050-A ** ON A/C NOT FOR ALL

D. Deactivate the Thrust Reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Deactivate the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 36-11-47-010-051-A ** ON A/C NOT FOR ALL

E. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 36-11-47-110-050-A ** ON A/C NOT FOR ALL

F. Cleaning of the HP Bleed Control Air Tubes

HP Bleed Control Air Tubes ** ON A/C NOT FOR ALL

(1) Clean the HP bleed control air tubes (1), (2), (3), (4) and (5).
(a) Make a clean Textile-Lint free Cotton - (Material No.14SBA1) moist with cleaning fluid (Material No.V01-002) . Use the cloth to clean the HP bleed control air tubes.
(b) Dry the HP bleed control air tubes with a clean Textile-Lint free Cotton - (Material No.14SBA1) .

4. Procedure
Subtask 36-11-47-210-050-A ** ON A/C NOT FOR ALL

A. Inspection of the High Pressure (HP) Bleed Control Air Tubes
(1) Examine the HP bleed control air tubes (1), (2), (3), (4) and (5) for security of attachment. Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION.

HP Bleed Control Air Tubes ** ON A/C NOT FOR ALL

(a) If the HP bleed control air tubes are loose, examine these items for damage, wear and loss of torque:

the attachment nuts and bolts,
the attachment clips,
the wire that safeties the connection,
the union nuts and the tube end fittings.

(b) If some of the above items have damage or wear, reject them.
(2) Examine the HP bleed control air tubes (1), (2), (3), (4) and (5) connections for signs of leaks. No leaks are permitted. Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION.

HP Bleed Control Air Tubes ** ON A/C NOT FOR ALL

(a) If signs of leaks are found:

examine the union nuts for loss of torque,
if there is a loss of torque, examine the union nuts and the tube end fittings for damage and wear.

(3) Examine the general condition of the HP bleed control air tubes (1), (2), (3), (4) and (5). Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION.

HP Bleed Control Air Tubes ** ON A/C NOT FOR ALL

(a) Examine the HP bleed control air tubes for cracks.

If a tube has cracks, reject it.

(b) Examine the HP bleed control air tubes for dents and damage.

If a tube has dents or damage, reject it.

5. Close-up
Subtask 36-11-47-410-051-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 halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 36-11-47-440-050-A ** ON A/C NOT FOR ALL

B. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 36-11-47-410-050-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).

Subtask 36-11-47-862-050-A ** ON A/C NOT FOR ALL

D. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.04.01 01:09:39 UTC