Leak Test of the Inlet Cowl Anti-Ice Supply Ducts with the Engine in Operation

TASK 30-21-49-790-010-A
Leak Test of the Inlet Cowl Anti-Ice Supply Ducts with the Engine in Operation

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.

1. Reason for the Job
This TASK gives the procedure for a leak test of the inlet cowl anti-ice supply ducts.
The test procedure checks for leaks around the couplings of the inlet cowl anti-ice supply ducts.
You must start the engines to do this procedure.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	AR	FOIL - ALUMINUM
No specific	1	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V02-147)	lockwire
(Material No.V06-032)	developer, dry

C. Work Zones and Access Panels

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

D. 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 30-21-49-000-806-A	Removal of the Anti-Ice Duct Insulation
TASK 30-21-49-400-806-A	Installation of the Anti-Ice Duct Insulation
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 71-00-00-710-018-A	Discontinued Start, Restart and Shutdown Procedures
TASK 71-00-00-710-043-A	Normal Engine Automatic-Start Procedure
TASK 71-00-00-710-047-A	Normal Engine Manual-Start Procedure
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)

3. Job Set-up

WARNING: MAKE SURE THAT THE LANDING GEAR GROUND SAFETIES AND THE WHEEL CHOCKS ARE IN POSITION. MOVEMENT OF THE AIRCRAFT CAN BE DANGEROUS.

Subtask 30-21-49-861-068-A ** ON A/C NOT FOR ALL

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

Subtask 30-21-49-860-076-A ** ON A/C NOT FOR ALL

B. Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. AMM TASK 31-60-00-860-001).

Subtask 30-21-49-941-094-A ** ON A/C NOT FOR ALL

C. Safety Precautions
(1) Make sure that the engine shutdown occurred not less than 5 minutes before you do this procedure.
(2) On the AIR COND panel 30VU:

make sure that the ENG 1(2) BLEED pushbutton switch is released (OFF legend is on)
make sure that the APU BLEED pushbutton switch is released (ON legend is off)
put a WARNING NOTICE(S) in position to tell persons not to operate the pneumatic system.

(3) On the HP ground connector:

put a warning notice in position to tell persons not to pressurize the pneumatic system.

Subtask 30-21-49-010-128-A ** ON A/C NOT FOR ALL

D. Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

Subtask 30-21-49-860-077-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Put an ACCESS PLATFORM 1M(3 FT) in position near the inlet cowl anti-ice supply ducts.

4. Procedure
Subtask 30-21-49-790-062-A ** ON A/C NOT FOR ALL

A. Preparation for the Leak Test
(1) Remove the anti-ice ducts insulation (Ref. AMM TASK 30-21-49-000-806).
(2) There are two procedures to find the location of an air leak, at a pneumatic joint. You can apply V06-032developer, dry around the couplings or you can install FOIL - ALUMINUM around the coupling locations.
Method 1.
Apply dry developer around the couplings on the inlet cowl anti-ice supply ducts.
Method 2.
Use the steps that follow to apply foil, aluminum to the inlet cowl anti-ice supply ducts.
(a) Wind the foil wrap around the coupling one time only.
(b) Twist the seam and two ends of the foil wrap tight.
(c) Make the foil wrap as tight as possible on the coupling but do not rip the wrap.
(d) Attach the foil wrap at the two sides of the coupling with lockwire (Material No.V02-147) .

Subtask 30-21-49-410-110-A ** ON A/C NOT FOR ALL

B. Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

Subtask 30-21-49-710-058-A ** ON A/C NOT FOR ALL

C. Do this test:
(1) Make sure the related inlet anti-ice valve is in the closed position (Off).
(2) Start the related engine with the automatic or manual start procedure (Ref. AMM TASK 71-00-00-710-043) or (Ref. AMM TASK 71-00-00-710-047) and keep it at idle.
(3) After 5 minutes, do the engine shutdown procedure (Ref. AMM TASK 71-00-00-710-018).

Subtask 30-21-49-010-129-A ** ON A/C NOT FOR ALL

D. Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

Subtask 30-21-49-360-050-A ** ON A/C NOT FOR ALL

E. Make sure that there are no leaks at the couplings on the inlet cowl anti-ice supply ducts on the related engine.
Method 1.
Do a visual check for a break in the dry developer around the couplings on the inlet cowl anti-ice supply ducts.
Method 2.
Do a visual check of the aluminum foil around the couplings on the inlet cowl anti-ice supply ducts.

NOTE: There is a leak when the leak air removes the dry developer from the coupling. There is a leak when the foil installed around the coupling breaks.

Subtask 30-21-49-860-078-A ** ON A/C NOT FOR ALL

F. Remove the materials used to do the leak test.

Subtask 30-21-49-420-088-A ** ON A/C NOT FOR ALL

G. Install the anti-ice ducts insulations (Ref. AMM TASK 30-21-49-400-806).

5. Close-up
Subtask 30-21-49-410-111-A ** ON A/C NOT FOR ALL

A. Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

Subtask 30-21-49-860-079-A ** ON A/C NOT FOR ALL

B. Put the aircraft back to its initial configuration.
(1) On the AIR COND panel 30VU:

release the ENG 1(2) BLEED pushbutton switch (OFF legend comes on).

(2) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).

Subtask 30-21-49-861-069-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 08:18:56 UTC