Reactivation of Transformer Rectifier TR1 (FAA only)

TASK 24-30-00-440-004-A
Reactivation of Transformer Rectifier TR1 (FAA only)

1. Reason for the Job
MMEL 24-30-01
TRANSFORMER/RECTIFIER UNITS (TR) (FAA ONLY)

NOTE: This task is applicable to aircraft that the FAA controls.

2. Job Set-up Information
A. 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)

3. Job Set-up
Subtask 24-30-00-860-064-A

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

Subtask 24-30-00-865-056-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
125VU	TR1/CNTOR/SPLY	4PU1	CF01

4. Procedure
Subtask 24-30-00-440-052-A

A. Reactivation of TR1
(1) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

[4PU1] .

(2) Do a reset of TR1 with the Multipurpose Control & Display Unit (MCDU)

On the MCDU:	On the "ELEC" page:
1.Adjust the brightness of the MCDU screen.
2.Push the MCDU MENU mode key.	On the MCDU: The "MCDU MENU" page comes into view.
3.Push the line key adjacent to the "CFDS" indication.	The "CFDS MENU" page comes into view.
4.Push the line key adjacent to the "SYSTEM REPORT/TEST" indication.	The "SYSTEM REPORT/TEST" page comes into view.
5.Push the line key adjacent to the "ELEC" indication.	The "SYSTEM REPORT/TEST/ELEC" page comes into view.
On the MCDU: 6.Push the line select key adjacent to the "TR1" indication.	The "TR1" page comes into view.
7.Push the line select key adjacent to the "RESET" indication.	On the "TR1" page: The "NO FAULT" indication comes into view. On the upper ECAM Display Unit (DU): The "TR1 FAULT" indication goes out of view. On the lower ECAM DU: TR1 supplies the DC1 busbar.
8.On the MCDU: Push the line select key adjacent to the RETURN indication until the CFDS menu page comes into view.

5. Close-up
Subtask 24-30-00-860-065-A

A. Put the aircraft back to its initial configuration.
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.03.31 23:23:10 UTC