Warning: bias large (In flight) (Using)

[flightmike]

What the heck does this mean?
I took off and received an IMU warning so I came back and did calibration. No issue, flew great again. When I was looking through flight record I could not fine the IMU warning but I found this!

I have been reading his forum since February and have never run across this. I have not had any issues since I received MP in April.

This is just the second IMU warning but nothing unusual.
I do usually get "Strong wireless interference" sometimes but I think I'm close to my house and router and comes and goes at start up only but goes away even before lift off.
This thing has been rock solid and no issues since I got it. Have had a dozen flights since with no issues.

I know you'll probably ask for flight record and files but won't be able to get to till weekend.

Anyone have a clue?

 

[geigy]

It's a gyro related message - you should probably calibrate the IMU using this procedure.

 

[flightmike]

Done that and all seems fine. I have just never see the phrase "bias large" and assumed the warning would say IMU.
The controller warned of IMU calibration.
Thanks.