Unbalance Data : Read Ground Data, Read and Load Flight Data [IAE]

TASK 77-32-34-869-048-B
Unbalance Data : Read Ground Data, Read and Load Flight 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
EVMU Menu
Read and Acquire Ground Data
Read Flight Data
Stabilized Conditions Requirements

3. Job Set-up
Subtask 77-32-34-861-077-A ** ON A/C NOT FOR ALL

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

Subtask 77-32-34-865-084-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 77-32-34-869-107-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) On the 1(2) MCDU, get the SYSTEM REPORT/TEST ENG page (Ref. AMM TASK 31-32-00-860-012).
(2) Push the line key adjacent to the ENG VIBRATION indication: the first EVMU page comes into view.

EVMU Menu ** ON A/C NOT FOR ALL

(3) Push the NEXT PAGE function key: the second EVMU MENU page comes into view.

EVMU Menu ** ON A/C NOT FOR ALL

(4) Push the line key adjacent to the ENGINE UNBALANCE indication to get the ENGINE UNBALANCE program.
(5) The ENGINE UNBALANCE menu comes into view.

4. Procedure
Subtask 77-32-34-869-108-A ** ON A/C NOT FOR ALL

A. Read the Ground Data:

ACTION	RESULT
1.Push the line key adjacent to the ENG 1 (2) GROUND ACQN indication.	The ENG1(2) GROUND ACQN page comes into view. Read and Acquire Ground Data ** ON A/C NOT FOR ALL
2.To read the unbalance ground data for the accelerometer A: Push the line key adjacent to the ACC.A indication.	An asterisk comes into view adjacent to the ACC.A indication.
3.Push the line key adjacent to the READ indication to get the ENG1(2) READ GROUND ACQN page.	The table that shows the values comes into view.
4.To read the unbalance ground data for the accelerometer B: Push the line key adjacent to the ACC.B indication.	An asterisk comes into view adjacent to the ACC.B indication.
5.Push the line key adjacent to the READ indication to get the ENG1(2) READ GROUND ACQN page.	The table that shows the values comes into view.
6.Push the line key adjacent to the RETURN indication.	The ENGINE UNBALANCE menu comes into view.

Subtask 77-32-34-869-110-A ** ON A/C NOT FOR ALL

B. Read the Flight Data:

ACTION	RESULT
1.On the ground, push the line key adjacent to the ENG 1 (2) FLIGHT DATA indication to get the ENG 1 (2) READ FLIGHT DATA page.	The table that shows the values comes into view. Read Flight Data ** ON A/C NOT FOR ALL
2.Push the line key adjacent to the RETURN indication.	The ENGINE UNBALANCE menu comes into view.

Subtask 77-32-34-869-111-A ** ON A/C NOT FOR ALL

C. Load the Flight Data Stabilized Conditions Requirements:

NOTE: A stabilized condition is reached when N1 speed does not fluctuate of + or - N RPM around N1 RPM selected during at least T seconds.

NOTE: Default values within the EVMU are:
N1 - N - TIME
-------------
4430 110 30
4456 110 30
4667 110 30
4800 110 30
4900 110 30

ACTION	RESULT
1.On the ground push the line key adjacent to the ENG 1 (2) LOAD indication to get the EVMU ENG 1 (2) LOAD page.	The table that shows the values comes into view. Stabilized Conditions Requirements ** ON A/C NOT FOR ALL
2.On the MCDU keyboard, write the new data. Example : stabilized conditions requirements N1 = 4420, N = 100, TIME = 20 You must type : 4420/100/20.	The new data comes into view in the scratch pad under the RETURN indication. NOTE: If you do typing errors use the CLEAR key on the MCDU keyboard.
3.Push the line key adjacent to the stabilized condition(s) requirement(s) you want to modify.	The new data comes into view and replaces the old value.
4.Push the line key adjacent to the SAVE indication to record the new stabilized condition(s) requirement(s). Do again steps 2. to 4. for each other new stabilized condition(s) requirement(s).
5.Push the line key adjacent to the RETURN indication.	The ENGINE UNBALANCE menu comes into view.
6.Push the MCDU MENU mode key.	The MCDU menu comes into view.

5. Close-up
Subtask 77-32-34-862-069-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 03:18:32 UTC