(2) On the MCDU 1(2), get the SYSTEM REPORT/TEST ENG page (Ref. TASK 31-32-00-860-012).

 (3) Push the key adjacent to the EVMU indication: the first EVMU page comes into view.

 (4) Push the NEXT PAGE key.

 (5) Push the key adjacent to the ENGINE UNBALANCE indication

 (6) The EVMU ENGINE UNBALANCE menu comes into view.

 4. Procedure
_________ (Ref. Fig. 510/TASK 77-32-34-991-951) Subtask 77-32-34-750-051
 A. Do the fan trim balance.
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. Push the line key adjacent to the ENG1(2) TRIM indication.

2. Push the line key adjacent to the VECTORIAL TRIM BALANCE CFM56-5B indication.

 3. Push the line key adjacent to the PREVIOUS DATA indication.

The EVMU ENG1(2) TRIM BALANCE menucomes into view.
The EVMU ENG1(2) VECTORIAL TRIM BALmenu comes into view.
The EVMU ENG1(2) PREVIOUS INSTALLEDSCREWS menu comes into view. Compare the data shown on the ENG1(2) PREVIOUS INSTALLED SCREWS menu with the data collected during the One Shot Trim
 F

R EEFF : 001-049, 052-099, 101-149, 151-199, E201-299, 301-399, 401-499, E ECES 『E Page 56677-32-34
EAug 01/05EE

 F  『
 E  C F M  E
 E  E
 E  56-5B  E
 E  E

 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
4. After the check of all the 36 holes/screw configurations, push the line key adjacent to the CONT indication.

5. Push the line key adjacent to the CONT indication.

6. Push the line key adjacent to the CONT indication.

7. Push the line key adjacent to the SELECT CURRENT DATA indication.

8. Push the line key related to the data that you use to do the trim balance:

 - FLIGHT DATA
 - or GROUND DATA
 - or MANUAL INPUT.

 9. Push the line key adjacent to the CONT indication.
Balancing procedure. If necessary update the data.
The EVMU ENG1(2) PRE BEAR1 VIB INPUTmenu comes into view. Compare the datashown on the MCDU screen with the datacollected during the One Shot Trim Balancing procedure. If necessary update the data.
The EVMU ENG1(2) PRE TRF VIB INPUT menucomes into view. Compare the data shown on the MCDU screen with the data collected during the One Shot Trim Balancing procedure. If necessary update the data.
The EVMU ENG1(2) VECTORIAL TRIM BALmenu comes into view.
The ENG1(2) CURRENT VIB INPUT menucomes into view.
The ENG1(2) CURRENT INSTALLED SCREWSmenu comes into view. Compare the data shown on the MCDU with the data collected in step D. for all the 36 holes and if necessary, type on the keyboard the current screw position and identification (XX/P0X).
 F 『R EEFF : 001-049, 052-099, 101-149, 151-199, E Page 56777-32-34
 E E201-299, 301-399, 401-499, Aug 01/05 E E ECES E F 『 E C F M E E E

 E 56-5B E

 Trim Balance - Vectorial Method
 Figure 510/TASK 77-32-34-991-951- 13 (SHEET 1)

 F 『R EEFF : 001-049, 052-099, 101-149, 151-199, E Page 56877-32-34
 E E201-299, 301-399, 401-499, Aug 01/05 E E ECES E F 『 E C F M E E E

 E 56-5B E

 Trim Balance - Vectorial Method
 Figure 510/TASK 77-32-34-991-951- 23 (SHEET 2)

 F 『R EEFF : 001-049, 052-099, 101-149, 151-199, E Page 56977-32-34
 E E201-299, 301-399, 401-499, Aug 01/05 E E ECES E F 『 E C F M E E E

 E 56-5B E

 Trim Balance - Vectorial Method
 Figure 510/TASK 77-32-34-991-951- 33 (SHEET 3)

 F 『R EEFF : 001-049, 052-099, 101-149, 151-199, E Page 57077-32-34
 E E201-299, 301-399, 401-499, Aug 01/05 E E ECES E

 F  『
 E  C F M  E
 E  E
 E  56-5B  E
 E  E

 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
10. Push the line key adjacent to The ENG1(2) SCREWS TO CHANGE menu comes

 the CONT indication.  into view. Do a print of this page and if there is more than one page, on the MCDU keyboard, push the NEXT PAGE pushbutton and do a print of each page. If you want to keep this new configuration push the line key adjacent to the UPDATE indication.

 11. On the MCDU, push the line key adjacent to the RETURN indication until the CFDS menu page comes into view.

 (1) On the spinner rear cone change the balance screws as indicated.
　
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