Visual Inspection of the Engine Bleed Air System (EBAS) after the Damage of the Engine Compressor

TASK 36-11-00-210-806-A
Visual Inspection of the Engine Bleed Air System (EBAS) after the Damage of the Engine Compressor

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.

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: ALWAYS USE APPLICABLE GLOVES TO TOUCH HOT PARTS. HOT PARTS CAN CAUSE INJURY TO PERSONS.

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: MAKE SURE THAT NO SOURCE OF COMPRESSED AIR IS IN OPERATION IN THE AIRCRAFT WHEN YOU DO THIS TASK. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY TO PERSONNEL CAN OCCUR.

ZONE: 210
ZONE: 410
ZONE: 420
ZONE: 450
ZONE: 460

1. Reason for the Job

NOTE: The procedure that follows is specified only for EBAS 1 (LH EBAS). The equivalent procedure is applicable for EBAS 2 (RH EBAS).

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific	1	LIGHT SOURCE - INSPECTION
No specific	1	MIRROR - INSPECTION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
98D27803000000	1	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION
98L12003001000	AR	HARNESS,SAFETY

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
410	ENG 1 PYLON BOX AND FORWARD FAIRING
420	ENG 2 PYLON BOX AND FORWARD FAIRING
450	ENG 1 THRUST REVERSER & EXHAUST SECTION
460	ENG 2 THRUST REVERSER & EXHAUST SECTION
191DB
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413CT, 413DT, 413ET, 437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423CT, 423DT, 423ET, 447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 27-00-00-080-002-A	Removal of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 27-00-00-480-002-A	Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 36-11-41-000-802-A	Removal of the Environmental Control System (ECS) Mid-Y Duct and the Intermediate Pressure Check Valve (IPCV)
TASK 36-11-41-400-802-A	Installation of the Environmental Control System (ECS) Mid-Y Duct and the Intermediate Pressure Check Valve (IPCV)
TASK 36-11-42-000-802-A	Removal of the Bleed-Air Precooler Exchanger
TASK 36-11-42-400-802-A	Installation of the Bleed-Air Precooler Exchanger
TASK 36-11-51-000-802-A	Removal of the HP Bleed Valve (HPV)
TASK 36-11-51-400-802-A	Installation of the HP Bleed Valve (HPV)
TASK 36-11-52-000-802-A	Removal of the Bleed Pressure-Regulator Valve
TASK 36-11-52-400-802-A	Installation of the Bleed Pressure-Regulator Valve
TASK 36-11-53-000-802-A	Removal of the Overpressure Valve
TASK 36-11-53-400-802-A	Installation of the Overpressure Valve
TASK 36-22-00-790-802-A	Leak Check on all the Bleed Air Ducts and the Packs Components
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
Engine Bleed-Air System - Location and Detail
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
TASK 54-52-11-000-805-A	Removal of the Access Skin Panels
TASK 54-52-11-400-805-A	Installation of the Access Skin Panels
TASK 54-53-11-000-804-A	Removal of the Pylon-to-Wing Access Panels and Doors
TASK 54-53-11-400-804-A	Installation of the Pylon-to-Wing Access Panels and Doors
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 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
TASK 54-52-11-000-805-A	Removal of the Access Skin Panels
TASK 54-52-11-400-805-A	Installation of the Access Skin Panels
TASK 54-53-11-000-804-A	Removal of the Pylon-to-Wing Access Panels and Doors
TASK 54-53-11-400-804-A	Installation of the Pylon-to-Wing Access Panels and Doors
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 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors

3. Job Set-up
Subtask 36-11-00-861-201-A ** ON A/C NOT FOR ALL

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 36-11-00-941-206-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) Make sure that the engine shutdown occurred five minutes or more before you do this procedure.
(2) In the cockpit, on AIR COND panel 30VU:
(a) The ENG 1 BLEED and ENG 2 BLEED pushbutton-switches are in the OFF position (the OFF legends are on).
(b) The APU BLEED pushbutton switch is in the OFF position (the ON legend is off).
(c) The PACK 1 and 2 pushbutton switches are in the OFF position (the OFF legends are on).
(d) Put a WARNING NOTICE(S) in position to tell persons not to operate the pneumatic system.
(3) In the cockpit, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1 and 2 control switches are in the OFF position, not less than five minutes before you do this procedure.
(c) Put the WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1 and 2 control switches.
(4) In the cockpit, on APU panel 25VU:
(a) Make sure that the FAULT and ON legends of the pushbutton switch MASTER SW are off.
(b) Put the WARNING NOTICE(S) in position to tell persons not to start the APU.
(5) Open access door 191DB, on the HP ground connector:
(a) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system.
(6) In the cockpit, on the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR 1 and 2 pushbutton-switches are off.
(b) Put the WARNING NOTICE(S) in position to tell persons not to energize FADEC 1 and 2.

WARNING: BEFORE YOU START WORK, YOU MUST PUT ON A SAFETY HARNESS AND ATTACH IT TO THE ACCESS PLATFORM. WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.

(7) Put on and attach the HARNESS, SAFETY before you start work in the work area.
(8) In the cockpit, on FLAPS panel 114VU:
(a) Put a 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION in position on the flap/slat control lever (Ref. AMM TASK 27-00-00-480-002).
(b) Put the WARNING NOTICE(S) in position on the flap/slat control lever to tell persons not to operate the flap/slat controls.

Subtask 36-11-00-865-271-A ** ON A/C NOT FOR ALL

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1000EM1 (ENGINE1)
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
49VU	AIR BLEED/APU BLEED VLV CTL/BMC1 OVRD	11HV	D14
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R41
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R40
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20
FOR FIN: 1000EM2 (ENGINE2)
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG2/FADEC B/AND EIU2	4KS2	Q40
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG2/FADEC B/AND EIU2	4KS2	R41
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22
122VU	AIR BLEED/APU BLEED VLV CTL/BMC2 OVRD	12HV	Z19

Subtask 36-11-00-010-285-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the fan cowl doors:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL and 438AR (Ref. AMM TASK 71-13-00-010-802).
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL and 448AR (Ref. AMM TASK 71-13-00-010-802).

Subtask 36-11-00-040-169-A ** ON A/C NOT FOR ALL

E. Deactivation of the Thrust Reverser (T/R) System

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 the T/R system unserviceable for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 36-11-00-010-286-A ** ON A/C NOT FOR ALL

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

Subtask 36-11-00-010-287-A ** ON A/C NOT FOR ALL

G. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position.
(2) Remove these access panels:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)

(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)

4. Procedure
Subtask 36-11-00-210-068-A ** ON A/C NOT FOR ALL

A. Detailed Visual Inspection of the EBAS

NOTE: If the borescope length is sufficient to examine the remaining position from the removed valve holes:

The parts of the valve removal is not necessary as the inspection is made by the borescope from the other valve holes.

NOTE: The visual quality of the borescope is important to have the sufficient visual precision during the inspection.

NOTE: Airbus recommends you to use a BORESCOPE SET for the borescope inspection.

(1) For the High Pressure Bleed Valve (HPV) and the Environmental Control System (ECS) HP ducts (MID Y-Duct):
(a) Remove HPV 4000HA1 (4000HA2) (Ref. AMM TASK 36-11-51-000-802).
(b) Visually examine HPV 4000HA1 (4000HA2) for one of the signs of Foreign Object Damage (FOD):

Metallic debris are found stuck in the butterfly valve
Dents and missing segments are present.

Replace HPV 4000HA1 (4000HA2) (Ref. AMM TASK 36-11-51-400-802). Not to install the HPV at this step.

(d) Do the borescope inspection of the ECS HP ducts (MID Y-Duct) for one of the signs of FOD:

If the metallic debris are found, remove metallic debris.

(e) Install serviceable HPV 4000HA1 (4000HA2) (Ref. AMM TASK 36-11-51-400-802).
(2) For the Pressure Regulating Valve (PRV), Overpressure Valve (OPV), Header of the HP/LP T-duct and pylon ducts:

NOTE: This procedure is applicable for the pipes from the HPV to the Intermediate Pressure (IP) bleed check-valve, OPV, Starter Air Valve (SAV) and PRV.

(a) Remove PRV 4001HA1 (4001HA2) (Ref. AMM TASK 36-11-52-000-802):
1 Visually examine the PRV for one of the signs of FOD:

Metallic debris are found stuck in the butterfly valve
Dents and missing segments are present.

2 If one of the above signs are found:

Replace and install serviceable PRV 4001HA1 (4001HA2) (Ref. AMM TASK 36-11-52-400-802). Not to install the PRV at this step.

3 Do the borescope inspection of the air ducts for one of the signs of FOD:

NOTE: This procedure is applicable for the air ducts from the OPV to the IPCV, HPV and SAV.

If the metallic debris are found, remove metallic debris.

4 Do the borescope inspection of OPV 7115HM1 (7115HM2) for one of the signs of FOD:

Metallic debris are found stuck in the butterfly valve
Dents and missing segments are present.

5 If one of the above signs are found:

Replace OPV 7115HM1 (7115HM2) (Ref. AMM TASK 36-11-53-000-802) and (Ref. AMM TASK 36-11-53-400-802).

6 Do the borescope inspection of the IP bleed check-valve for one of the signs of FOD:

Metallic debris are found stuck in the butterfly valve
Dents and missing segments are present.

7 If one of the above signs are found:

Replace the IP bleed check-valve (Ref. AMM TASK 36-11-41-000-802) and (Ref. AMM TASK 36-11-41-400-802).

(b) Install serviceable PRV 4001HA1 (4001HA2) (Ref. AMM TASK 36-11-52-400-802).
(3) For bleed-air PreCooler Exchanger (PCE) 7150HM1 (7150HM2):
(a) Remove PCE 7150HM1 (7150HM2) (Ref. AMM TASK 36-11-42-000-802).
(b) Visually examine the PCE with an MIRROR - INSPECTION and an LIGHT SOURCE - INSPECTION for one of the signs of FOD:

If FOD or metallic debris are found, remove metallic debris.

1 Do the borescope inspection of the pylon duct to OPV 7115HM1 (7115HM2).
(c) Install serviceable PCE 7150HM1 (7150HM2) (Ref. AMM TASK 36-11-42-400-802).

5. Close-up
Subtask 36-11-00-865-272-A ** ON A/C NOT FOR ALL

A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1000EM1 (ENGINE1)
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
49VU	AIR BLEED/APU BLEED VLV CTL/BMC1 OVRD	11HV	D14
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R41
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R40
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20
FOR FIN: 1000EM2 (ENGINE2)
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG2/FADEC B/AND EIU2	4KS2	Q40
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG2/FADEC B/AND EIU2	4KS2	R41
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22
122VU	AIR BLEED/APU BLEED VLV CTL/BMC2 OVRD	12HV	Z19

Subtask 36-11-00-790-087-A ** ON A/C NOT FOR ALL

B. Leak Test
(1) Do a leak test of the EBAS (Ref. AMM TASK 36-22-00-790-802):
(a) Make sure that there are no leaks.

Subtask 36-11-00-410-281-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install these access panels:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)

(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)

Subtask 36-11-00-410-282-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Close the thrust reverser cowl-doors:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL and 452AR (Ref. AMM TASK 78-36-00-410-802).
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL and 462AR (Ref. AMM TASK 78-36-00-410-802).

Subtask 36-11-00-440-157-A ** ON A/C NOT FOR ALL

E. Reactivation of the T/R System
(1) Make the T/R system serviceable after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 36-11-00-410-283-A ** ON A/C NOT FOR ALL

F. Close Access
(1) Put the aircraft back to its initial configuration.
(2) Close the fan cowl doors:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL and 438AR (Ref. AMM TASK 71-13-00-410-802).
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL and 448AR (Ref. AMM TASK 71-13-00-410-802).
(3) Remove all the fixtures, tools, test and support equipment used during this procedure.
(4) Remove the access platform(s).
(5) In the cockpit, on FLAPS panel 114VU:
(a) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap/slat control lever (Ref. AMM TASK 27-00-00-080-002).
(6) Remove the WARNING NOTICE(S).

Subtask 36-11-00-862-177-A ** ON A/C NOT FOR ALL

G. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 01:07:55 UTC