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Marcel11

747-400 FMC: Forecast-Page, "TAI / ON ALT"?

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Hello folksCan someboday tell me what does it mean "TAI/ ON ALT" in the FORECAST-Page of the FMC? I didn't find it on the manual.Thanks for your answersregardsMarcel

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>Can someboday tell me what does it mean "TAI/ ON ALT" in the>FORECAST-Page of the FMC? I didn't find it on the manual.Marcel,in this line you'd enter the altitude at which you are expecting/planning the use of nacelle antiice. The use of nacelle anti ice increases the idle thrust limit which needs to be considered in your descent profile during VNAV descents.Hope this helps.Kris

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