Active Vibration Control System (AVCS)

Question 1

The AVCS maintains a consistent vibration performance with varying rotor speeds between:

Answer 1

90-105% NR.

Question 2

Does AVCS eliminate vibrations?

Answer 2

No, it just reduces them.

Question 3

How much force can the main cabin overhead vibration absorber (FG #1) produce?

Answer 3

1000lbs

Question 4

How much force can the legacy nose vibration absorber produce (FG #2)?

Answer 4

450lbs

Question 5

How much force can the right hand step vibration absorber produce (FG #3)?

Answer 5

450lbs

Question 6

Reducing airspeed may:

Answer 6

Reduce Vibrations.

Abnormal vibrations not affected by the VIB CONT sw position or associated with an AVC system failure may require more immediate action.

Question 7

What are the components of the AVCS?

Answer 7

Active vibration control computer, electronic unit, 3 force generators, 10 accelerometers, and NR speed sensor.

Question 8

The FMS can be accessed to check the ___ or initiate a ___ of the AVCS.

Answer 8

Status and BIT

Question 9

The AVCS INOP advisory illuminates in flight to indicate:

Answer 9

Total failure of AVCS.