noticed something that might be a performance calculation issue with the A220.

During my flight, the FMS showed:

• CRZ ALT: FL360

• OPT ALT: FL370

• MAX ALT: FL370

After about 3 hours of flight, the aircraft had burned a significant amount of fuel and become considerably lighter. However, the FMS was still showing exactly the same values: CRZ FL360, OPT FL370, MAX FL370.

I understand that the OPT altitude may remain the same, but shouldn’t the MAX altitude be recalculated as the aircraft gets lighter?

Interestingly, SimBrief was predicting a step climb to FL380 about 150 NM later.

Could this be a bug where the MAX ALT calculation is not updating dynamically with aircraft weight/fuel burn?

Just bumping this in case it got missed. Has anyone else noticed the same issue?

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4 minutes ago, Atlas calıskan said:

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Hi,

Thank you for sharing your observations and feedback. This question would be best directed to the Synaptic team through their official Discord, where they should be able to provide more specific information and assistance.

Thank you!