AVM monitors engine vibration data and is located where?

AVM monitors engine vibration data and is located where?

• A. Near Forward End of the Engine (#1 Bearing) on the Fan Frame Compressor Case
• B. On the Tail Section
• C. On the Accessory Gearbox
• D. Inside the Oil Sump

Answer: (A)

Vibration monitoring aims to capture signals from the rotating components where faults first appear. Mounting sensors at the forward end of the engine, on the fan frame/compressor case right at the #1 bearing, places them closest to the primary rotor and its supports. This location provides a rigid, well-coupled path for the vibration that reflects imbalances, bearing wear, rubs, or misalignment early, giving the AVM system meaningful data for health assessment. Other spots are less effective: the tail section is distant from the rotor dynamics and introduces unrelated noise; the accessory gearbox location monitors a different subsystem and may miss rotor faults; and the oil sump is not ideal for reliable vibration sensing due to oil environment and signal distortion.

Vibration monitoring aims to capture signals from the rotating components where faults first appear. Mounting sensors at the forward end of the engine, on the fan frame/compressor case right at the #1 bearing, places them closest to the primary rotor and its supports. This location provides a rigid, well-coupled path for the vibration that reflects imbalances, bearing wear, rubs, or misalignment early, giving the AVM system meaningful data for health assessment.

Other spots are less effective: the tail section is distant from the rotor dynamics and introduces unrelated noise; the accessory gearbox location monitors a different subsystem and may miss rotor faults; and the oil sump is not ideal for reliable vibration sensing due to oil environment and signal distortion.