Operational Check of the Engine-Anti-Ice System Fault-Warning

TASK 30-21-00-710-001-A
Operational Check of the Engine-Anti-Ice System Fault-Warning

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.

ZONE: 210

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
FOR [1000EM1] (ENGINE-1)
438AR
FOR [1000EM2] (ENGINE-2)
448AR

B. 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 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
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 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
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

3. Job Set-up
Subtask 30-21-00-861-050-A ** ON A/C NOT FOR ALL

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

Subtask 30-21-00-875-050-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 30-21-00-860-059-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 (ON and FAULT legends off).

Subtask 30-21-00-010-051-B ** ON A/C NOT FOR ALL

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

Subtask 30-21-00-010-051-C ** 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 30-21-00-010-051-D ** 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.

4. Procedure
Subtask 30-21-00-710-050-A ** ON A/C NOT FOR ALL

A. Operational Check of the Engine-Anti-Ice System Fault-Warning

ACTION	RESULT
CAUTION: DO NOT APPLY A TORQUE OF MORE THAN 70 LBF.IN. WHEN YOU OPEN OR CLOSE THE VALVE MANUALLY. HIGH TORQUE CAN CAUSE DAMAGE TO THE INTERNAL SHAFT IN THE VALVE. IF THE VALVE DOES NOT OPEN OR CLOSE WHEN YOU APPLY THE SPECIFIED TORQUE, YOU MUST DO AN OVERHAUL OF THE VALVE. 1.On the anti ice valve: Remove the locking pin from the STOW position. Turn and set the manual override control to OPEN with a hexagonal wrench . Lock in this position with the pin. Make sure that the visual position indicator shows open.	On the ANTI ICE section of panel 25VU: on the ENG1 (2) pushbutton switch, the FAULT legend comes on.
CAUTION: DO NOT APPLY A TORQUE OF MORE THAN 70 LBF.IN. WHEN YOU OPEN OR CLOSE THE VALVE MANUALLY. HIGH TORQUE CAN CAUSE DAMAGE TO THE INTERNAL SHAFT IN THE VALVE. IF THE VALVE DOES NOT OPEN OR CLOSE WHEN YOU APPLY THE SPECIFIED TORQUE, YOU MUST DO AN OVERHAUL OF THE VALVE. 2.On the anti ice valve: Remove the locking pin from the LOCK position. Release the valve and set the manual override control to CLOSE. Make sure that the visual position indicator shows closed.	On the ANTI ICE section of panel 25VU: on the ENG1 (2) pushbutton switch, the FAULT legend goes off.
3.On the anti ice valve: put the locking pin back to the STOW position.
4.On the ANTI ICE section of panel 25VU: push the ENG1 (2) pushbutton switch	On the ANTI ICE section of panel 25VU: on the ENG1 (2) pushbutton switch, the FAULT and ON legends come on
release the ENG 1(2) pushbutton switch.	on the ENG 1(2) pushbutton switch, the FAULT and ON legends go off.

5. Close-up
Subtask 30-21-00-410-051-B ** ON A/C NOT FOR ALL

A. Close Access
(1) Close the fan cowl door (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
438AR,
(b) FOR [1000EM2] (ENGINE-2)
448AR.

Subtask 30-21-00-410-051-C ** 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 30-21-00-410-051-D ** 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 30-21-00-862-050-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 00:29:00 UTC