strange reddish tunnel vision in cockpit

[lancealotg]

I had a strange effect today cruising at 16000 ft.

A strange reddish like circle around the outside of my vision.

Plane was pressurized ok saying a 4000 foot altitude in cabin.

I put my oxygen mask on anyway with no effect.

It went away later near the end of the flight.

Does anyone know what that was?

[Jf17]

Do you mean the Tbm 900?

If s, then your cabin temperature is too high so you have to cool it down. Look in the ECS info for the cabin temeperature.

You can cool down the Tbm's cabin by increasing the fan speed.

Greetings.

[lancealotg]

Ok, that explains it.

I had the ac on auto, will have to try manual if it happens again.

I first thought my monitor was going bad lol.

She is a wonderful plane.

Thanks