Inspection/Check of the Seal 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

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: 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
Visual inpection of the Seal of the Engine Air-Intake Anti-Ice Valve (4000DN).
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-076)	Methyl Ethyl Ketone, Technical grade
(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 30-21-51-000-010-B	Removal of the Engine Air Intake Anti-ice Valve
TASK 30-21-51-400-010-B	Installation of the Engine Air Intake Anti-ice Valve
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
Subtask 30-21-51-861-057-A ** ON A/C NOT FOR ALL

A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

Subtask 30-21-51-941-056-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the ENG section of the maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize the FADEC 1(2).

Subtask 30-21-51-865-067-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
122VU	ANTI ICE/ENG/2	1DN2	W10
122VU	ANTI ICE/ENG/1	1DN1	X10

Subtask 30-21-51-010-062-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 30-21-51-010-063-A ** ON A/C NOT FOR ALL

E. Remove the engine air-intake anti-ice valve (4000DN) (Ref. AMM TASK 30-21-51-000-010).

4. Procedure
Subtask 30-21-51-210-058-A ** ON A/C NOT FOR ALL

A. Do a visual inspection of the anti-ice valve seal
(1) Examine the seal for signs of oxidation or loose carbon pieces.
(2) Examine the seal for marks or any unwanted material, caused from contact with other parts.

Subtask 30-21-51-110-053-A ** ON A/C NOT FOR ALL

B. Clean the anti-ice valve seal

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

(1) If necessary, use a clean Textile-Lint free Cotton - (Material No.14SBA1) , made moist with V01-076Methyl Ethyl Ketone, Technical grade, to clean the seal.
(2) Dry the seal with a clean piece of lint-free cloth.

Subtask 30-21-51-210-059-A ** ON A/C NOT FOR ALL

C. Examine the anti-ice valve seal
(1) Examine the edges of the seal for cracks, dents, pitting and scratches.
(2) If the seal is damaged or any marks or unwanted materials cannot be removed, replace the seal.

5. Close-up
Subtask 30-21-51-410-061-A ** ON A/C NOT FOR ALL

A. Install the engine air-intake anti-ice valve (4000DN) (Ref. AMM TASK 30-21-51-400-010).

Subtask 30-21-51-410-062-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (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 30-21-51-865-068-A ** ON A/C NOT FOR ALL

C. 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 30-21-51-862-055-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 08:20:25 UTC