(b)
Push and release the NO button three times until the BALANCE option shows.
(c)
Push and release the YES button to go to the balance menu. This causes the AIRLINE GENERIC AXX (where XX = 01 to 99) screen to show.
(d)
Push and release one of the four buttons. This causes the BAL FOR ENGINE 1? screen to show.
(e)
To get the balance data for engine 1, push and release the YES button. This causes the IMBAL DATA READ? screen to show.
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CFM56 ENGINES
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(f) To get the balance data for engine 2, do these steps: 1) Push and release the NO button. This causes the BAL FOR ENGINE 2? screen to show.
2) Push and release the YES button. This causes the IMBAL DATA READ? screen to show.
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(2) If you must look at historical balance data for other flights or trim balance runs, do these steps to go into the IMBAL DAT READ? menu to read the balance data:
NOTE: This menu item is not necessary for the trim balance
____ calculation. This menu only shows the balance history for the last 6 flights or trim balance runs.
(a) 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 in
____ memory, and can be 1 through 6. If NO IMBAL DATA shows, there is no stored balance data in the AVM. If you push and release the NO button, the HOLE CONFIG? screen will show.
(b) Push and release the NO button. This causes the FLIGHT X? screen to show.
NOTE: The X refers to the flight number, and can be 0 through
____ 5, where 0 is the last flight. Use the UP and DOWN ARROW buttons to make a selection of the flight that you want to see the imbalance history on.
(c) Push and release the YES button. The screen that shows gives the highest imbalance data for the selected flight that was recorded (Table 502).
NOTE: The definitions of the screen are given below.
____
NOTE: Use the UP and DOWN ARROW buttons to get one of the
____ five other highest imbalance histories that was recorded during each flight.
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72-31-00
ALL ú ú C10 Page 582D ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
~............................................. | TABLE 502 | | AVM Front Panel Display | ............................................... | E 1 X X . X % | | | | n . n n / y y y | | | | m . m m / z z z | 2.............................................1 1) xx.x - N1 rotor speed in percent 2) n.nn - the fan displacement in mils 3) m.mm - the LPT displacement in mils 4) yyy - the phase angle for the fan in degrees 5) zzz - the phase angle for the LPT in degrees.
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(3) If it is necessary to read or change the balance screw data, do these steps to go into the HOLE CONFIG? menu (Fig. 502):
NOTE: This menu item is not necessary for the trim balance
____ calculation. However, if you change the balance screw data, then you must do another flight or engine run to re-calculate new balance data. This menu item only shows the current balance weights installed. Also, if the installed weights change, you can change the balance weight data in the AVM.
(a)
From the IMBAL DATA READ? screen, push and release the NO button. This causes the HOLE CONFIG? screen to show.
(b)
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