(a)  
From the IMBAL DATA READ? screen, push and release the NO
 button two times. This causes the BALANCE 1 PLANE COMPUTE?
 screen to show.

 (b)  
Push and release the YES button. This causes the X FLIGHTS
 DISPLAY? screen to show.

 NOTE: The X refers to the total number of flights or trim
____
 balance runs in memory, and is 1 through 6.

 NOTE: If no IMBAL DATA shows, there is no stored balance
____ data in the AVM. If you push and release the NO button after the NO IMBAL DATA or X FLIGHTS DISPLAY? screens, 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).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(c)  Push and release the YES button. This causes the screen to show (Table 504).
 NOTE: This screen give the imbalance solution for each
____ flight or trim balance run. The definitions of the screen are given below.
 NOTE: Use the UP and DOWN ARROW buttons to get the
____ imbalance solutions for each of the last 6 flights or trim balance runs that was recorded in the AVM.
 ~............................................. | TABLE 504 | | AVM Front Panel Display | ............................................... | n  n  n  n  /  y  y  y | | | | | | A  A  A F X ? | 2.............................................1 1) nnn - the fan balance weight solution (in gm-cm) 2) yyy - the fan balance weight position (in degrees) 3) AAA - the identifier of the uploadable parameter set (A00
 to A99) 4) FX - the flight number (0 to 5, with 0 the last flight or trim balance run)
 (d)  Push and release the YES button. This causes the BALANCE IN PROGRESS screen to show.
 NOTE: If you push and release the NO button, 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).
 (e)  After a short time, one of these four screens will show on the display. The screen that is shown depends on the solution found. 1) If the SOLUTION FOUND DISPLAY? screen shows, there is a
 balance solution to balance the fan.
 2)  If the WEIGHT LIMIT EXCEEDED screen shows, the balance solution value calculated is too large to install on the fan.
 NOTE: To exit this menu, push and release the NO
____ button. 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 was on).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 72-31-00
 ALL  ú ú C10 Page 582H ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
3)  If the NO CHANGE REQUIRED screen shows, the balance solution that is currently installed is satisfactory.
 NOTE: To exit this menu, push and release the NO
____ button. 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 was on).
 4)  If the NO IMBAL DATA ACQUIRED screen shows, there was a problem and the balance solution was not calculated.
 NOTE: To exit this menu, push and release the NO
____ button. 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 was on).
 a)  If the inflight data does not give a balance solution, do the alternate acceleration procedure (AMM 71-00-00 (AMM 71-00-00/501, Test 7, Vibration Survey), then do this procedure again.
 NOTE: The alternate procedure will run the engine
____ at increasing N1 speed intervals to help get the data necessary to plot a balance solution.
 5)  Push and release the YES button. This causes this screen to show (Table 505).
 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.
　
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