Operational Test of the NAI Valve

TASK 30-21-00-710-003-A
Operational Test of the NAI Valve

1. Reason for the Job

NOTE: For more precision in the operational test of the NAI valve, Airbus recommends operators to use bleed test set P/N 98L36103002000.

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

REFERENCE	QTY	DESIGNATION
98L36103002000	1	TEST SET - ENGINE BLEED

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
438AR, 452AR
FOR [1000EM2] (ENGINE-2)
448AR, 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 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
Location of the Muscle Pressure Hose

3. Job Set-up
Subtask 30-21-00-861-052-A ** ON A/C NOT FOR ALL

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

Subtask 30-21-00-865-064-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
122VU	ANTI ICE/ENG/2	1DN2	W10
122VU	ANTI ICE/ENG/1	1DN1	X10

Subtask 30-21-00-860-067-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) On the ANTI ICE section of 25VU:

make sure that the ENG1 (2) pushbutton switch is released.

Subtask 30-21-00-010-064-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the right fan cowl door (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
438AR,
(b) FOR [1000EM2] (ENGINE-2)
448AR.

Subtask 30-21-00-010-065-A ** ON A/C NOT FOR ALL

E. Open the right thrust reverser door (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
452AR
(2) FOR [1000EM2] (ENGINE-2)
462AR

4. Procedure
Subtask 30-21-00-710-056-A ** ON A/C NOT FOR ALL

A. Functional test of the NAI valve

Location of the Muscle Pressure Hose ** ON A/C NOT FOR ALL

(1) Disconnect the muscle pressure hose (2) on the NAI valve (1).
(2) Connect the 98L36103002000 TEST SET - ENGINE BLEED or equivalent to the anti-ice valve muscle pressure port.
(3) Pressurize the NAI valve to 10 psig (0.6895 bar).
(4) On the ANTI ICE section of 25VU:

Push the ENG 1 (2) pushbutton switch ON.

(5) Check that the ECAM show: no disagree and no fault warning.
(6) Check that the position indicator shows OPEN on the NAI valve.
(7) On the ANTI ICE section of 25VU:

Push the ENG 1 (2) pushbutton switch OFF.

(8) Check that the ECAM show: no disagree and no fault warning.
(9) Check that the position indicator shows CLOSED on the NAI valve.
(10) Depressurize the NAI valve.
(11) Disconnect the 98L36103002000 TEST SET - ENGINE BLEED or equivalent to the anti-ice valve muscle pressure port.
(12) Connect the muscle pressure hose (2) on the NAI valve (1).

5. Close-up
Subtask 30-21-00-410-064-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Close the right fan cowl-door (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
438AR,
(b) FOR [1000EM2] (ENGINE-2)
448AR.

Subtask 30-21-00-410-065-A ** ON A/C NOT FOR ALL

B. Close the right thrust reverser door (Ref. AMM TASK 78-36-00-410-040):
(1) FOR [1000EM1] (ENGINE-1)
452AR
(2) FOR [1000EM2] (ENGINE-2)
462AR

Subtask 30-21-00-862-052-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 00:29:02 UTC