737-800 TAI vs climb performance

[John_McYul]

Hi,
Would anybody be aware of any en route climb performance penalties when engine and/ or wing anti-ice are used ?
It doesn’t seem to appear in the flight planning and performance manual tables.

[FlyingStone]

You could apply the same fuel burn penalties as for cruise (+45kg/h for engine anti-ice). Wing anti-ice is unlikely to be used for any prolong period of time during climb in the 737.

[John_McYul]

Hi, thanks for your answer.
I was rather referring to climb gradients penalties, not fuel burns. In the en route climb performance tables you find distances to reach altitudes, but no mention of anti ice use cases.
I don’t know either if FMS corrects its altitude computations iaw TAI use.