737 Flight Crew Operations Manual
Engines, APU -
Engine System Description
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP 7.20.17
Airborne Vibration Monitoring System
The airborne vibration monitoring (AVM) system monitors engine vibration
levels. Its primary function is the display of low and high pressure rotor
synchronous vibration on the secondary engine display. The AVM is also used to
balance the low pressure rotor. Balancing reduces high vibration indication or
audible noise and tactile vibration.
September 15, 2016
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