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BALANCE ENGINES
The BALANCE ENGINES menu selection lets you do these
tasks:
* See fan and LPT imbalance data for the last flight (cycle or
leg)
AVM SYSTEM - AVM SIGNAL CONDITIONER BITE - MAIN MENU - TRAINING INFORMATION POINT
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* See and modify balance weight information in AVM nonvolatile
memory
* Make the AVM signal conditioner calculate a balance
solution for 1 plane (fan only)
* Make the AVM signal conditioner calculate a balance
solution for 2 planes (fan and low pressure turbine).
See the BALANCE ENGINES - TIP pages that follows in this
section for more information this part of the BITE menu.
ERASE STORED DATA
The ERASED STORED DATA menu selection lets you erase
these sets of data from AVM signal conditioner non-volatile
memory:
* Flight history
* Imbalance data
* Balance weight information.
See the ERASED STORED DATA - TIP page that follows in this
section for more information this part of the BITE menu.
AVM SYSTEM - AVM SIGNAL CONDITIONER BITE - MAIN MENU - TRAINING INFORMATION POINT
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AVM SYSTEM - AVM SIGNAL CONDITIONER BITE - MAIN MENU - TRAINING INFORMATION POINT
AVM SYSTEM - AVM SIGNAL CONDITIONER BITE - MAIN MENU - TRAINING INFORMATION POINT
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Purpose
The SELF TEST menu lets you start an internal test of the AVM
signal conditioner. Any faults show at the end of the test.
General
To start the test, push the YES BITE switch from the SELF TEST
display in the main menu.
All pixels (segments) of the display will come on for several
seconds during the test. A pass or fail message shows after the
test is complete.
The display goes blank after a short time delay if the test
passes. Follow AMM, part 2 procedures to replace the signal
conditioner if the fail message shows. Component overhaul
technicians use the shop fault messages to determine
necessary bench maintenance.
AVM SYSTEM - AVM SIGNAL CONDITIONER BITE - SELF TEST - TRAINING INFORMATION POINT
EFFECTIVITY
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AVM SYSTEM - AVM SIGNAL CONDITIONER BITE - SELF TEST - TRAINING INFORMATION POINT
AVM SYSTEM - AVM SIGNAL CONDITIONER BITE - SELF TEST - TRAINING INFORMATION POINT
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Purpose
All AVM system external faults (messages) show in the
SYSTEM FAULTS part of the BITE menu. You also use this
main menu item to erase fault messages from nonvolatile
memory.
General
The AVM signal conditioner detects an external fault when it
loses valid engine N1 or N2 input. Tachometer failure or a
problem with the tachometer wiring to the signal conditioner
may result in an external fault.
One of two displays show after you push the NO switch from the
SELF TEST display. The NO SYSTEM FAULTS message shows
if no faults are in memory.
The X SYSTEM FAULTS SHOW? message shows if the AVM has
failures in memory. The X gives the number of faults in memory.
You use the YES switch to see the first fault message. Use the
down arrow switch to see any additional faults that are in
memory. Push the NO switch from any fault message to return
to the X SYSTEM FAULTS SHOW? display.
You erase all fault messages from nonvolatile memory when
you push the YES BITE switch from the ERASE SYSTEM
FAULTS? display. This display shows after you see the last fault
message.
When you enter the SYSTEM FAULTS menu, the AVM signal
conditioner also does a test to see if it can supply a balance
solution. If not, the NO BALANCE FUNCTION message shows.
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