Load Frequency Analysis [CFMB]

TASK 77-32-34-860-044-A
Load Frequency Analysis

FIN: 2EV ** ON A/C NOT FOR ALL

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)
EVMU Frequency Analysis Report

3. Job Set-up
Subtask 77-32-34-861-067-A ** ON A/C NOT FOR ALL

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

Subtask 77-32-34-865-076-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 77-32-34-869-095-A ** 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 line key adjacent to the EVMU indication: the first EVMU page comes into view.

4. Procedure
Subtask 77-32-34-860-058-A ** ON A/C NOT FOR ALL

A. Load Frequency Analysis

Engine Unbalance Data - PRE AIRBUS SB 77-1006 (P/N 241-191-000-041) ** ON A/C NOT FOR ALL

Engine Unbalance Data - POST AIRBUS SB 77-1006 (P/N 241-246-022-004) ** ON A/C NOT FOR ALL

ACTION	RESULT
1.Push the NEXT PAGE mode key	The second EVMU page comes into view
2.Push the line key adjacent to the FREQUENCY ANALYSIS indication.	The EVMU FREQUENCY ANALYSIS menu comes into view
3.Push the line key adjacent to the LOAD LEFT (RIGHT) N1 (N2) indication.	The EVMU FREQUENCY ANALYSIS ENGINE LEFT (RIGHT) N1 (N2) page comes into view NOTE: The Frequency Analysis can occur during cruise (flight phase 6) or when the aircraft is on the ground, engine(s) running (flight phase 2, 3 or 9).
4.Enter the new values on the MCDU keyboard.	The values come into view in the MCDU scratch pad. NOTE: You can correct typing errors with the CLEAR key of the keyboard.
5.After you enter all the characters, push the line key adjacent to the old values.	The new values replace the old values and REQUEST ON FOR N1 (N2) is comes into view. NOTE: The operator can enter or clear up to three lines of comments with the comments menu. These three lines will show on the printout of the frequency analysis.
6.Push the line key adjacent to the COMMENTS indication	The EVMU FREQUENCY ANALYSIS COMMENTS menu comes into view.
7.Push the line key adjacent to the LOAD LINE 1 indication.	A new submenu LOAD COMMENT LINE 1 comes into view.
8.Enter the comment on the MCDU keyboard (up to 24 characters)	The comment comes into view in the MCDU scratchpad. NOTE: You can correct typing errors with the CLEAR key of the keyboard.
9.Push the line key adjacent to the SAVE indication	The EVMU FREQUENCY ANALYSIS COMMENTS menu comes into view. NOTE: Push the line key adjacent to the RETURN indication to keep the COMMENT line without chance.
10.Do again steps 6 to 8 for line 2 and 3 if if necessary.
11.On the MCDU, push the line select key adjacent to the RETURN indication until the CFDS menu page comes into view.
12.Stop the MCDU.

EVMU Frequency Analysis Report ** ON A/C NOT FOR ALL

NOTE: When the speed and phase are those shown on the MCDU, the printer will automatically print the Frequency Analysis. The printer gives the vibration in "G Peak", every 4Hz and in frequency range from 4 to 500Hz.

NOTE: The frequency analysis is automatically and only printed during the flight phase 10 if the printer is installed and paper is loaded in the printer.

5. Close-up
Subtask 77-32-34-862-067-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] 2026.04.02 06:37:44 UTC