Installation of the Engine Air Intake Anti-ice Valve

TASK 30-21-51-400-010-B
Installation of the Engine Air Intake Anti-ice Valve

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

FIN: 4000DN ** ON A/C NOT FOR ALL

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

REFERENCE	QTY	DESIGNATION
No specific	AR	COVER - PROTECTION
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 55 and 45 lbf.in (0.62 and 0.51 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-076)	Methyl Ethyl Ketone, Technical grade
(Material No.V02-147)	lockwire
(Material No.14SBA1)	Textile-Lint free Cotton -

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 24-42-00-861-001-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 30-21-00-710-001-A	Operational Check of the Engine-Anti-Ice System Fault-Warning
TASK 30-21-00-710-002-A	Operational Check of the Engine-Air-Intake Ice-Protection System (with the Engines in operation)
TASK 30-21-49-790-010-A	Leak Test of the Inlet Cowl Anti-Ice Supply Ducts with the Engine in Operation
TASK 30-21-49-820-001-A	Rig the Anti-ice Ducts
TASK 30-21-51-000-010-B	Removal of the Engine Air Intake Anti-ice Valve
TASK 30-21-51-210-041-A	Inspection/Check of the Seal of the Engine Air-Intake Anti-Ice Valve
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 70-23-13-911-010-A	Procedures for the Installation of Preformed Packings
TASK 70-23-15-912-010-A	Connection of Electrical Connectors
TASK 70-40-11-911-014-A	Locking Devices General Information
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 71-13-16-200-010-A	Inspection of the Outer Skin of the Right Fan Cowl
Anti-ice Valve 4000DN

3. Job Set-up
Subtask 30-21-51-860-053-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) On the ENG panel 115VU, make sure that the WARNING NOTICE(S) is in position to tell persons not to start the engine.
(3) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize the FADEC system 1(2).

Subtask 30-21-51-865-063-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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 30-21-51-010-058-A ** ON A/C NOT FOR ALL

C. Make sure that the fan cowls are open (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

4. Procedure
Subtask 30-21-51-210-053-A ** ON A/C NOT FOR ALL

A. Check for Delamination
(1) Do an inspection of the outer skin of the right fan cowl for delamination in the area forward of the starter blow out door (Ref. AMM TASK 71-13-16-200-010).

Subtask 30-21-51-210-056-A ** ON A/C NOT FOR ALL

B. Check of the Seals
(1) Do a check of the seals (2) and (6) of the engine air-intake anti-ice valve (4000DN) (Ref. AMM TASK 30-21-51-210-041).

Subtask 30-21-51-110-051-A ** ON A/C NOT FOR ALL

C. Clean the Ends of the Duct
(1) Remove the COVER - PROTECTION from the duct ends, the anti-ice valve (4), the electrical connector and the electrical receptacle.
(2) Use a Textile-Lint free Cotton - (Material No.14SBA1) made moist with V01-076Methyl Ethyl Ketone, Technical grade, to clean the ends of the ducts and the anti-ice valve (4).

Subtask 30-21-51-420-053-A ** ON A/C NOT FOR ALL

D. Installation of the Engine Air Intake Anti-ice Valve

CAUTION: MAKE SURE THAT THE COUPLINGS ARE TURNED SO THAT THE CLAMPS DO NOT TOUCH ADJACENT COMPONENTS/FAN COWL DOORS AND FAN-COWL DOOR HINGES. IF THE COUPLINGS ARE NOT TURNED CORRECTLY, DAMAGE CAN OCCUR.

(1) Put the anti-ice valve (4) and the two seals (2) and (6) (Ref. AMM TASK 70-23-13-911-010) in the correct position for installation (Ref. AMM TASK 30-21-51-000-010).

NOTE: Make sure that the arrow on the valve points is in the correct direction.

(2) Install the anti-ice couplings (3) and (5).
(3) Tighten the coupling nut of the anti-ice couplings (3) and (5) sufficiently to keep the anti-ice valve (4) in position.
(4) Rotate the anti-ice valve (4) to get the minimum clearances that follow:

CAUTION: MAKE SURE THAT YOU GET THE CORRECT CLEARANCES. IF YOU DO NOT GET THE CORRECT CLEARANCES, DAMAGE TO THE FAN COWL DOOR AND AIR STARTER DUCT CAN OCCUR.

(a) 0.40 in. (10.16 mm) between the anti-ice valve (4) and the air starter duct (7).
(b) 0.25 in. (6.35 mm) between the anti-ice valve (4) and the fire shield (8).

NOTE: Make sure that there is a minimum clearance of 0.39 in. (9.91 mm) between the valve connector and the air starter duct.

(5) TORQUE the coupling nut of the anti-ice couplings (3) and (5) to between 55 and 45 lbf.in (0.62 and 0.51 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(6) Remove the CAP-BLANKING from each electrical connector and receptacle.
(7) Connect the electrical connector 4000DN-A (1) to the anti-ice valve (4) (Ref. AMM TASK 70-23-15-912-010).

Subtask 30-21-51-790-051-A ** ON A/C NOT FOR ALL

E. Check of the Anti-ice Duct Installation
(1) Make sure that the segments are correctly installed in the pylon housing and the NAI pylon duct stays aligned to the center of the fire bulkhead area, (see Detail C) given in the rigging of the anti ice ducts procedure (Ref. AMM TASK 30-21-49-820-001).
(a) If the segments are not correctly installed in the pylon housing and/or the NAI pylon duct is not aligned to the center of the fire bulkhead area:

Go to Step (4).

(b) If the segments are correctly installed in the pylon housing duct and the NAI pylon duct is aligned to the center of the fire bulkhead area:

Go to Step (2).

(2) Make sure that all the clearances given in adjustment of the ducts of the rigging of the anti ice ducts procedure are correct (Ref. AMM TASK 30-21-49-820-001).
(a) If one of these clearances is not correct:

Go to Step (4).

(b) If all of these clearances are correct:

Go to Step (3).

(3) Do movement of the duct N°4 given in the rigging of the anti-ice ducts procedure (Ref. AMM TASK 30-21-49-820-001).

Do a check of the clearances given in the adjustment of the ducts of the rigging of the anti-ice ducts procedure around the ducts again:

(a) If the clearances are correct, go to Step (5).
(b) If the clearances are not correct, go to Step (4).
(4) Do the rigging of the anti-ice ducts (Ref. AMM TASK 30-21-49-820-001).
(5) Do a leak test at the couplings (3) and (5) (Ref. AMM TASK 30-21-49-790-010).

Subtask 30-21-51-865-062-A ** ON A/C NOT FOR ALL

F. 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
122VU	ANTI ICE/ENG/2	1DN2	W10
122VU	ANTI ICE/ENG/1	1DN1	X10

Subtask 30-21-51-710-054-A ** ON A/C NOT FOR ALL

G. Operational Test
(1) Do the operational test of the engine air-intake ice protection (Ref. AMM TASK 30-21-00-710-002) or the operational test of the anti-ice system fault warning (Ref. AMM TASK 30-21-00-710-001).

Subtask 30-21-51-420-064-A ** ON A/C NOT FOR ALL

H. Installation of the Insulations around the Anti-ice Valve and Couplings

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(1) Install the insulations around the anti-ice couplings (3) and (5).
(2) Put the insulation (9) in a position that prevents its movement around the anti-ice valve (4).
(3) Safety the insulation with lockwire (Material No.V02-147) (Ref. AMM TASK 70-40-11-911-014).
(4) Make sure that the lockwire (Material No.V02-147) is laid flat on the insulations.
(a) Install the lockwire (Material No.V02-147) between the attachment lugs.

5. Close-up
Subtask 30-21-51-410-053-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 fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).

Subtask 30-21-51-862-052-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 04:09:52 UTC