Reset of the Radio Altimeter (RA)

TASK 34-42-00-860-801-A
Reset of the Radio Altimeter (RA)

1. Reason for the Job
To do a reset of the RA.
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
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 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure

3. Job Set-up
Subtask 34-42-00-860-058-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-42-00-861-001).
(2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).

Subtask 34-42-00-865-062-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 2SA1 (XCVRRA, 1)
121VU	COM NAV/RAD ALTM/1	1SA1	K11
FOR FIN: 2SA2 (XCVRRA, 2)
121VU	COM NAV/RAD ALTM/2	1SA2	K12

4. Procedure
Subtask 34-42-00-860-059-A

A. Reset of the RA

NOTE: This test is for RA1. For RA2, you can use the indications given in parentheses.

ACTION	RESULT
1.On rear C/B panel 121VU:	On the upper ECAM DU:
Open circuit breaker 1SA1 (1SA2) and wait for approximately five seconds.	The NAV RA 1(2) FAULT message comes into view.
2.On rear C/B panel 121VU:	On the upper ECAM DU:
Close circuit breaker 1SA1 (1SA2) and wait for approximately five seconds.	The NAV RA 1(2) FAULT message goes out of view.

5. Close-up
Subtask 34-42-00-860-060-A

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:23:23 UTC