曝光台 注意防骗
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for these engine areas:
* Fan/low pressure compressor (LPC)
* High pressure compressor (HPC)
* High pressure turbine (HPT)
* Low pressure turbine (LPT).
Engine Vibration Data History
The AVM signal conditioner holds engine vibration data
information for the last 32 flights (engine cycles) of each
engine. A new flight starts when one engine speed is more than
45 percent N2. The flight stops when both engines go less than
45 percent N2. You can see this data in the FLIGHT HISTORY
MENU on the display. See the FLIGHT HISTORY - TIP page in
this section for more information.
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Balance Function
The AVM signal conditioner uses engine vibration data
(historical) in non-volatile memory to calculate one-plane (fan)
and two-plane (fan and LPT) balance solutions. You use the
BITE display and switches to operate the balance function and
to see the solutions. See the BALANCE - TIP pages in this
section for more information.
GUN 001-099, 101-113, 115, 201-999
AVM System BITE and Fault History
A test occurs each time the AVM signal conditioner gets initial
electrical power or when you start a test from the SELF TEST
MENU on the display. See the SELF TEST - TIPS page in this
section for more information.
The AVM signal conditioner does a test to monitor these items:
* Internal circuits
* N1 signal from engine 1 and engine 2
* N2 signal from engine 1 and engine 2.
The AVM signal conditioner keeps up to 32 fault (maintenance)
messages in its non-volatile memory. You can see this data on
the display in the FAULT HISTORY MENU. See the FAULT
HISTORY - TIP page in this section for more information.
GUN 114
AVM System BITE and Fault History
A test occurs each time the AVM signal conditioner gets initial
electrical power or when you start a test from the SELF TEST
menu on the display. See the SELF TEST - TIPS page in this
section for more information.
The AVM signal conditioner does a test to monitor these items:
* Internal circuits
* N1 signal from engine 1 and engine 2
* N2 signal from engine 1 and engine 2.
The AVM signal conditioner keeps fault (maintenance)
messages in its non-volatile memory. You can see this data
on the display in the SYSTEM FAULTS menu. See the SYSTEM
FAULTS - TIP page in this section for more information.
GUN 111-114
Data Access
These are the two methods to see or erase the engine vibration
data and fault history data:
* Use the front panel BITE and display
* Use an ARINC 429 databus analyzer and an optional test
box.
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GUN 111-114 (Continued)
The test box makes it easier for you to read and erase data
when you use an ARINC 429 databus analyzer. You can use the
databus analyzer without the test box.
See part 2 of the AMM or FIM for complete procedures.
GUN 001-099, 101-110, 115, 201-999
Data Access
To get access to the engine vibration data, use the BITE
switches and the front panel display. The display is activated
when you push one of the four BITE switches.
See part 2 of the AMM or FIM for complete procedures.
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AVM SYSTEM - AVM SIGNAL CONDITIONER
AVM SYSTEM - AVM SIGNAL CONDITIONER
EFFECTIVITY
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77-31-00-002
AVM SYSTEM - AVM SIGNAL CONDITIONER
AVM SYSTEM - AVM SIGNAL CONDITIONER
EFFECTIVITY
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CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
77-31-00-002
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
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