Acquire Unbalance Data During the Flight and Read Unbalance Data [CFMI]

TASK 77-32-34-869-042-A
Acquire Unbalance Data During the Flight and Read Unbalance Data

1. Reason for the Job
Self explanatory
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)
TASK 31-32-00-860-012-A	Procedure to Get Access to the SYSTEM REPORT/TEST/ENG Page
Engine Unbalance Data - PRE AIRBUS SB 77-1006 (P/N 241-191-000-041)
Engine Unbalance Data - POST AIRBUS SB 77-1006 (P/N 241-246-022-004)
Engine Unbalance Data - PRE AIRBUS SB 77-1006 (P/N 241-191-000-041)
Engine Unbalance Data - POST AIRBUS SB 77-1006 (P/N 241-246-022-004)

3. Job Set-up
Subtask 77-32-34-861-053-A ** ON A/C NOT FOR ALL

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

Subtask 77-32-34-865-056-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
121VU	ENGINE/ENG1 AND 2/EVMU	1EV	R44

Subtask 77-32-34-869-059-B ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) On the MCDU 1(2), get the SYSTEM REPORT/TEST ENG page (Ref. AMM TASK 31-32-00-860-012).
(2) Push the key adjacent to the EVMU indication: the first EVMU page comes into view.
(3) Push the NEXT PAGE key.
(4) Push the key adjacent to the ENGINE UNBALANCE indication.
(5) The EVMU ENGINE UNBALANCE menu comes into view.

4. Procedure
Subtask 77-32-34-869-060-B ** ON A/C NOT FOR ALL

A. Modification of the Preloaded Speed Values

NOTE: The EVMU ENGINE UNBALANCE menu permits selection of N1 speeds only from 50 percent to 99 percent rpm for the acquisition in flight. If you try to set a value out of this range the EVMU will not accept it and will keep the old value.

ACTION	RESULT
1.Push the line key adjacent to the LOAD indication for the left or the right engine to get the LOAD program.	Configuration of the applicable engine comes into view.
	PRE AIRBUS SB 77-1006 (P/N 241-191-000-041) Detail B. NOTE: If one or more accelerometer is defective the indications come into view. Engine Unbalance Data - PRE AIRBUS SB 77-1006 (P/N 241-191-000-041) ON A/C NOT FOR ALL END OF PRE AIRBUS SB 77-1006 POST AIRBUS SB 77-1006 (P/N 241-246-022-004) Detail B. NOTE: If one or more accelerometer is defective the indications come into view. Engine Unbalance Data - POST AIRBUS SB 77-1006 (P/N 241-246-022-004) ON A/C NOT FOR ALL END OF POST AIRBUS SB 77-1006
Detail C. 2.On the MCDU keyboard, load the new value. Two digits for N1 speed One digit 0, 1 or 2 for N Two digits between 4 and 99 for time NOTE: You must insert a "/" between N1, N and TIME when you type these data.	PRE AIRBUS SB 77-1006 (P/N 241-191-000-041) The new value comes into view under the RETURN indication Engine Unbalance Data - PRE AIRBUS SB 77-1006 (P/N 241-191-000-041) ON A/C NOT FOR ALL Detail B. END OF PRE AIRBUS SB 77-1006 POST AIRBUS SB 77-1006 (P/N 241-246-022-004) The new value comes into view under the RETURN indication Engine Unbalance Data - POST AIRBUS SB 77-1006 (P/N 241-246-022-004) ON A/C NOT FOR ALL Detail B. END OF POST AIRBUS SB 77-1006
3.Push the line key adjacent to the old values that you must to change	The new values come into view and replace the old values.
	NOTE: If the EVMU does not accept the new value, the old value comes into view and you must do the operation again.
4.Do the procedure again to change the other values if necessary.
5.Push the line key adjacent to the SAVE indication.
6.On the MCDU, push the line select key adjacent to the RETURN indication until the CFDS menu page comes into view.

Subtask 77-32-34-869-061-B ** ON A/C NOT FOR ALL

B. Read the Engine Unbalance Data

ACTION	RESULT
1.Push the line key adjacent to the READ indication for the left or the right engine to get the READ program.	The values recorded during the flight come into view
	PRE AIRBUS SB 77-1006 (P/N 241-191-000-041) Engine Unbalance Data - PRE AIRBUS SB 77-1006 (P/N 241-191-000-041) ON A/C NOT FOR ALL END OF PRE AIRBUS SB 77-1006 POST AIRBUS SB 77-1006 (P/N 241-246-022-004) Engine Unbalance Data - POST AIRBUS SB 77-1006 (P/N 241-246-022-004) ON A/C NOT FOR ALL END OF POST AIRBUS SB 77-1006 NOTE: No data come into view if for a loaded speed the acquisition did not occur, the message NO ACQUISITION is shown in this case.
2.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 77-32-34-862-053-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 03:17:05 UTC