(f)
Record each new balance screw and its location on the fan spinner.
(g)
After you use the DOWN ARROW button to show the last hole (number 38), push and release the DOWN ARROW once and the screen below will sho (Table 508).
NOTE: The screen that shows gives the balance weight and
____ its location that are necessary to balance the fan. The definitions of the screen are given below.
NOTE: Use the UP and DOWN ARROW buttons to get the
____ imbalance weights that are necessary for the other holes on the fan (1 to 134). To exit this screen, push and release the NO button and the DISPLAY SOLUTION AGAIN? screen will show.
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72-31-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
~.............................................
| TABLE 508 |
| AVM Front Panel Display |
...............................................
| E 1 |
| |
| B l a d e x x x |
| |
| A d d N O X |
2.............................................1
1) xxx - the blade number (1 to 134)
2) NOX - the weight that must be installed.
(h)
Record each new balance weight and its LPT blade location.
(i)
After you use the DOWN ARROW button to show the last hole (number 134), push and release the DOWN ARROW once and the DISPLAY SOLUTION AGAIN? screen will show. To see the solution again, push and release the YES button.
(j)
Push and release the NO button. This causes the SAVE NEW CONFIG? screen to show.
(k)
Push and release the YES button to keep the new balance weight solution.
NOTE: After the YES button is pushed, the balance history
____
in the AVM is erased.
(l)
If you do not want to keep the new balance weight solution, push and release the NO button.
(m)
After the YES or NO button was pushed, the BAL FOR ENGINE 2? screen will show (if the engine 1 menu was on) or the display will go off (if the engine 2 menu was on).
(n)
Install the new balance screws to balance the fan as follows (Fig. 502):
CAUTION: MAKE SURE THAT YOU PUT A MAT ON THE LOWER SURFACE OF
_______ THE INTLET COWL. DAMAGE TO THE INLET COWL SURFACES CAN OCCUR.
1) Put the mat on the inner lower half of the inlet cowl.
2) Find the number one fan blade. This blade is immediately above the offset hole (machined dimple) on the fan disk bolt flange. a) Use a marking pen, (C05-003) to put a mark on this
blade to identify it as the number one blade.
3) At the first hole where you will install a new balance
screw, remove the installed balance screw.
4) Lubricate the new balance screw with grease, GP460,
Aeroshell 8 and install on the spinner.
5) Do the above steps to install all other balance screws.
6) Remove the mat and all the other unwanted material from the
inlet cowl.
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72-31-00
ALL ú ú C09 Page 582N ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(o) Install the new balance weights to balance the LPT as follows (Figs. 521-524):
NOTE: The balance weight is a clip that is attached to the
____
LPT blade.
WARNING: MAKE SURE THAT THE NOZZLE AND PLUG ARE SUFFICIENTLY
_______ COOL BEFORE YOU DO THESE STEPS. IF THEY ARE TOO HOT, INJURIES TO PERSONS CAN OCCUR.
1) Put the first blade tip on which you will put a balance weight clip to the 6 o'clock position.
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