Operational Test of the Emergency Generator Control Unit (GCU) through Centralized Fault Display System (CFDS)

TASK 24-24-00-710-002-A
Operational Test of the Emergency Generator Control Unit (GCU) through Centralized Fault Display System (CFDS)

ZONE: 210

1. Reason for the Job
Refer to the MPD TASK: 242400-02
OPERATIONAL CHECK OF EMERGENCY GCU VIA CFDS
Make sure that the protection modules (overvoltage, undervoltage, overfrequency, underfrequency) of the emergency GCU operate correctly, with the CFDS.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
812, 822

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 31-32-00-860-004-A	Procedure to Get Access to the SYSTEM REPORT/TEST/ELEC Page

3. Job Set-up
Subtask 24-24-00-010-052-A

A. Get access to the avionics compartment.
(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE at the access doors 812 and 822 of the avionics compartments.
(2) Open the access doors 812 and 822.

Subtask 24-24-00-865-056-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
105VU	ELEC/CSM/G /EV AUTO/SPLY	7XE	C01
106VU	CSM/G /EV/MAN/SPLY	6XE	B04

Subtask 24-24-00-860-052-A

C. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the procedure to get the SYSTEM REPORT/TEST ELEC page. (Ref. AMM TASK 31-32-00-860-004).

4. Procedure
Subtask 24-24-00-710-051-A

A. Operational Test of the GCU EMER from the CFDS

ACTION	RESULT
1.On the MCDU, on the SYSTEM REPORT/TEST ELEC page: push the line key adjacent to the GCU EMER indication.	On the MCDU: the GCU EMER page comes into view.
2.On the MCDU, on the GCU EMER page: push the line key adjacent to the TEST indication.	On the MCDU, on the GCU EMER page: the TEST OK message comes into view.
	On the CSM/G GCU: the red LED goes off after 10 seconds.

5. Close-up
Subtask 24-24-00-860-053-A

A. Put the aircraft back to its initial configuration.
(1) On the MCDU, push the line select key adjacent to the RETURN indication until the CFDS menu page comes into view.
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 24-24-00-410-052-A

B. Close Access
(1) Close the access doors 812 and 822.
(2) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 04:13:09 UTC