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Push YES from the SOLUTION FOUND DISPLAY? message to
see the solutions. The balance screws you should remove or
install shows for locations that require a change.
The DISPLAY SOLUTION AGAIN ? message shows after the last
necessary change. Push the YES switch to see the balance
solutions again. Push the No switch to go to the SAVE NEW
CONFIG. ? menu.
Push YES to save the new data in AVM memory only if you plan
to follow the solution and remove and install the appropriate
balance screws. This makes sure that the balance weight data
(weight classification and location) in AVM non-volatile memory
agrees with the actual engine. If the new weight configuration is
saved, the imbalance data for the last six flights will be cleared.
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AVM SYSTEM - AVM SIGNAL CONDITIONER BITE - BALANCE PG 4 - TRAINING INFORMATION POINT
EFFECTIVITY
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CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
77-31-00-137
AVM SYSTEM - AVM SIGNAL CONDITIONER BITE - BALANCE PG 4 - TRAINING INFORMATION POINT
AVM SYSTEM - AVM SIGNAL CONDITIONER BITE - BALANCE PG 4 - TRAINING INFORMATION POINT
EFFECTIVITY
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77-31-00-137
AVM SYSTEM - AVM SIGNAL CONDITIONER BITE - BALANCE PG 4 - TRAINING INFORMATION POINT
AVM SYSTEM - AVM SIGNAL CONDITIONER BITE - BALANCE PG 4 - TRAINING INFORMATION POINT
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
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AVM SYSTEM - AVM SIGNAL CONDITIONER BITE - BALANCE PG 4 - TRAINING INFORMATION POINT
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General
Push the YES switch from the BALANCE 2 PLANE COMPUTE?
display to have the AVM signal conditioner supply a balance
solution for the engine fan and low pressure turbine (LPT).
The X FLIGHTS DISPLAY? message shows if the AVM has flight
history vibration data in memory. X is the total number of flights
with vibration data that you may chose from to use in balance
function. The maximum number of flights to chose from is 6. You
can look at the data of each individual flight in the IMBAL DATA
READ? menu. See BALANCE PG 2 for more information.
Push the YES switch from the X FLIGHTS DISPLAY? message to
go to the next display. This display shows information for flight
zero (the last flight) in history. NNNN is the module vector of the
fan in gram-centimeters. YYY is the phase of the fan vibration
vector in degrees. MMMM is the module of the LPT vector in
gram-centimeters. ZZZ is the phase of the LPT vibration vector
in degrees. F0 tells you that this data is for flight zero. Push the
YES switch to go to flight 1 data. You must select one flight (set
of data) for the AVM signal conditioner to use in its calculation of
the balance solution. Push the YES switch to select that flight.
The BALANCE IN PROGRESS message shows during the
balance calculations.
The SOLUTION FOUND DISPLAY? message shows to tell you
that the calculations are done. There are three other messages
are also possible. These are the messages that can show:
* NO CHANGE REQUIRED
* WEIGHT LIMIT EXCEEDED
* NO IMBAL DATA ACQUIRED.
Push YES from the SOLUTION FOUND DISPLAY? message to
see the fan solution. The balance screws that you should
remove and install at specific locations show. The LPT balance
data follows the fan balance data. For the LPT, the necessary
screws to add and their locations show.
Push YES to save the new data in AVM memory if you plan to
follow the solution and remove and install appropriate balance
screws. This makes sure that the fan balance weight data
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