Installation of the Engine Air-Intake Anti-Ice Valve

TASK 30-21-51-400-041-A
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.

ZONE: 410
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	1	HAMMER - FIBER
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 85 and 70 lbf.in (0.96 and 0.79 m.daN )
No specific	Torque wrench: range to between 150 and 135 lbf.in (1.70 and 1.53 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP1059)	Methanol

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
410	ENG 1 PYLON BOX AND FORWARD FAIRING
FOR [1000EM1] (ENGINE-1)
438AR
FOR [1000EM2] (ENGINE-2)
448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
25	PACKING	AIPC 30-21-49-01-280

E. 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 30-21-00-710-002-A	Operational Check of the Engine-Air-Intake Ice-Protection System (with the Engines in operation)
TASK 30-21-49-790-802-A	Leak Test of the Nacelle Anti-Ice Supply-Ducts and Hoses with the Engine in Operation
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
Engine Air-Intake Anti-Ice Valve
Duct Coupling Installation

3. Job Set-up
Subtask 30-21-51-865-056-A ** ON A/C NOT FOR ALL

A. 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 30-21-51-860-051-A ** ON A/C NOT FOR ALL

B. 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 30-21-51-010-056-A ** ON A/C NOT FOR ALL

C. Make sure that the right fan cowl door is open (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
438AR,
(2) FOR [1000EM2] (ENGINE-2)
448AR.

4. Procedure
Subtask 30-21-51-160-050-A ** ON A/C NOT FOR ALL

A. Clean the Seals
(1) Clean the surface of the E-seals (20) and (31) with a clean cloth made moist with Methanol (Material No.CP1059) .

Subtask 30-21-51-210-055-A ** ON A/C NOT FOR ALL

B. Visually Inspect the Seals
(1) Inspect the seal for signs of oxidation, carbon flakes and foreign substances left on the seal from contact with the mating flanges.
(2) Inspect the surface and the edges of the seal for dents, pitting, cracks, scratches and distortion.
(3) If any substance cannot be removed from the seals or if damage or distortion exists, the seal should be replaced.

Subtask 30-21-51-420-054-A ** ON A/C NOT FOR ALL

C. Installation of the Engine Air-Intake Anti-Ice Valve
(1) Remove the CAP-BLANKING from each electrical connector and receptacle.
(2) Remove the PLUG-BLANKING from each disconnected line end.
(3) Put the anti-ice valve (5) between the forward duct and the nozzle duct. Make sure that the flow arrow on the valve points to the nozzle duct and the index mark is aligned with the forward duct.
(4) Attach the anti-ice valve to the ducts:

CAUTION: MAKE SURE THE SMOOTH CIRCULAR SURFACE OF THE COUPLING IS RADIALLY OUTBOARD FROM THE ENGINE. DO NOT LET THE COUPLING TOUCH ENGINE COMPONENTS OR STRUCTURE. DAMAGE TO THE COMPONENTS OR STRUCTURE COULD OCCUR.

CAUTION: WHEN YOU CLOSE THE COUPLING, MAKE SURE THE SADDLE WASHER IS IN CORRECT POSITION. THE SADDLE WASHER IN THE END OF THE SLIDE MUST BE BETWEEN THE NUT AND THE COUPLING BODY. IF THE COUPLING IS NOT CLOSED CORRECTLY IT WILL FAIL.

(a) Install the E-seal (20) and the E-seal (31) on the anti-ice valve (5). Attach the anti-ice valve (5) to the ducts with the couplings (15).
(b) Examine the coupling (15). Try to move the slide. If the slide moves, open the coupling. Close the coupling with the saddle washer in the correct position between the nut and the coupling body.
(5) TORQUE the couplings (15) as follows:

CAUTION: MAKE SURE THAT THE DUCTS ARE CORRECTLY CONNECTED WHEN YOU TORQUE THE COUPLINGS. IF THE DUCTS ARE NOT CORRECTLY CONNECTED THEY CAN LEAK AND CAUSE DAMAGE TO ADJACENT ELECTRICAL COMPONENTS.

(a) TORQUE the couplings (15) to between 85 and 70 lbf.in (0.96 and 0.79 m.daN )

.
(b) Lightly hit the coupling perimeters with a HAMMER - FIBER .
(c) Torque the coupling again to the same torque value and lightly hit the coupling perimeter again.
(d) Do this procedure again, then torque to the same value.
(6) Install the union (10) in the anti-ice valve (5) with the new AIPC 30-21-49-01-280 PACKING (25).
(7) TORQUE the union (10) to between 150 and 135 lbf.in (1.70 and 1.53 m.daN )

.
(8) Connect the hose coupling to the union (10).
(9) TORQUE the coupling to between 150 and 135 lbf.in (1.70 and 1.53 m.daN )

.
(10) Connect the electrical connector to the anti-ice valve (5). Tighten the connector by hand plus one-eighth of a turn.

Subtask 30-21-51-865-057-A ** ON A/C NOT FOR ALL

D. 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 30-21-51-869-057-A ** ON A/C NOT FOR ALL

E. On the ANTI ICE section of the panel 25VU, make sure that the ENG1 (2) pushbutton switch is released.

Subtask 30-21-51-710-053-A ** ON A/C NOT FOR ALL

F. Do this test:

ACTION	RESULT
1.On the ANTI ICE section of the panel 25VU: push the ENG1 (2) pushbutton switch	the ON legend of the ENG1 (2) pushbutton switch comes on the FAULT legend of the ENG1 (2) pushbutton switch comes on
release the ENG1 (2) pushbutton switch.	the ON and FAULT legends of the ENG1 (2) pushbutton switch go off.

Subtask 30-21-51-710-055-A ** ON A/C NOT FOR ALL

G. Tests
(1) Do the leak test of the couplings at the engine air-intake anti-ice valve (Ref. AMM TASK 30-21-49-790-802).
(a) When you operate the related engine at the minimum idle during the leak test, do the operational test of the engine air-intake ice-protection (with the engines in operation) (Ref. AMM TASK 30-21-00-710-002).

5. Close-up
Subtask 30-21-51-410-054-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 right fan cowl door (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
438AR,
(b) FOR [1000EM2] (ENGINE-2)
448AR.
(3) Remove the WARNING NOTICE(S).

Subtask 30-21-51-862-050-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 00:30:19 UTC