(b) Put a warning notice to tell persons not to energize the FADEC 1(2).
Subtask 77-32-34-860-065
D. Aircraft System Configuration
(1) On the spinner rear cone, record the identification (P0X) and the position of all the 36 balance screws.
NOTE : The balance screws are identified by a number (P0X) engraved
____
on the screw head.
NOTE : A spherical mark is machined on the spinner rear cone to show
____ the fan blade No.1 location. The fan blade No.1 is to the left of the mark, forward looking aft (the blades are counted counterclockwise).
Subtask 77-32-34-869-098
E. Aircraft Maintenance Configuration
(1) To do this procedure, flight or ground vibration data must be available (Ref. TASK 77-32-34-860-042) or (Ref. TASK 77-32-34-860-043).
(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.
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(Ref. Fig. 509/TASK 77-32-34-991-950) Subtask 77-32-34-750-050
A. Do the fan trim balance.
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1. Push the line key adjacent to the ENG1(2) TRIM indication.
2. Push the line key adjacent to the ONE SHOT CFM56-5B indication.
3. Push the line key related to the data that you use to do the trim balance:
- FLIGHT DATA
- or GROUND DATA
- or MANUAL INPUT.
4. Collect the vibration data on the result sheet or by a print of the MCDU screens. These data are necessary if you must do a trim balance with the vectorial method.
5. Push the line key adjacent to the CONT indication.
6. Push the line key adjacent to the GENERIC COEFF CFM56-5B indication.
NOTE : You can use a specific
____ coefficient to trim balance the engine. In this case you must type the N1/SENS/DEG data for the bearing 1 and TRF sensors in the ENG1(2) SPECIFIC COEFF menu.
The EVMU ENG1(2) TRIM BALANCE menucomes into view.
The EVMU ENG1(2) CURRENT VIB INPUT menucomes into view.
The vibration data comes into view.
The INFLUENCE COEFF SELECT menu comesinto view.
The ENG1(2) INSTALLED CURRENT SCREWSmenu comes into view. Compare the datashown on the MCDU with the data collected in step D. for all the 36holes and if necessary type on thekeyboard the screw identification (P0X)and press the line key adjacent to thecurrent screw position.
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7. Collect the hole/screw configuration on the result sheet or by a print of the MCDU screens. These data are necessary if you must do a trim balance with the vectorial method.
8. Push the line key adjacent to the CONT indication to memorize the screw configuration.
9. On the MCDU, push the line key adjacent to the RETURN indication until the CFDS menu page comes into view.
The ENG1(2) SCREWS TO CHANGE menu comesinto view. Do a print of this page andif 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.
NOTE : If the line key adjacent to the
____ UPDATE indication is pushed, the new values replace the values in the ENG1(2) INSTALLED CURRENT SCREWS menu.
(1) On the spinner rear cone change the balance screws as indicated.
(a) Lightly coat the balance screws with graphite grease (Material No. CP2101).
(b) TORQUE the balance screws to between 65 and 75 lbf.in (0.73 and
0.84 m.daN).
5. Close-up
________ Subtask 77-32-34-942-054
A. Remove the warning notice(s).
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