Carl Hwung

Ive met the similar problem

If this is indeed the root cause, I believe the iniBuilds team, as a close partner of MSFS 2024, should be able to raise this issue with Microsoft and request improvements to the Xbox Nav'data cache system.

The problem occours again today. It seems that yesterday’s success was just a low-probability event.😭😭😭

I subscribed to Navigraph and tried the CPNY FPLN request again. It eventually worked: it stayed on “PENDING” for about 20 seconds, returned to the CPNY FPLN page, and about 52 seconds in total, I received the FPLN successfully. So the FPLN transfer is working now, but the response time is quite long. Is this amount of delay expected on Xbox, or could there still be an issue with the connection or server response?

Hi, I think there may be a misunderstanding. My EFB shows that 3rd Party AIRAC cycle is 2303R1(pic attached below), not 2608 as you said. My free SimBrief account is currently using AIRAC 2503(latest free ver). Does this mismatch cause the FMS flight plan transfer issue? Also, is subscribing to Navigraph the only way to solve this, or is there any free alternative? Thanks!

Hi, My SimBrief AIRAC cycle is 2503

I found another bug that seems to point to the same underlying issue: EFB-to-FMS communication is not working. EFB T.O PERF computes normally, but the results cannot be sent to the FMS. SimBrief can be imported into the EFB, but the FMS cannot receive the flight plan. So it appears that the FMS is not receiving any data from the EFB on XBOX SERIES X, rather than this being a SimBrief-specific problem.

Hi, Thank you for taking the time to investigate this and for arranging a test on Xbox. I really appreciate it. I hope the team can reproduce the issue and determine whether it is specific to the Xbox version. I’ll wait for your update.

I re-downloaded and reinstalled the A350 through the in-game Marketplace, then completely restarted MSFS 2024 and tested again. Unfortunately, the issue remains exactly the same. I’m using Xbox Series X. In Cold & Dark, SimBrief import works normally, and Flt Ops Sts and Load Sheet load correctly. However, FMS FPLN Request stays on “Pending Request” for about 10–20 seconds and then returns without loading the flight plan. I have also tested both SIMDEFAULT and NAVIGRAPH NAVDATA sources, with the same result. Could you please investigate whether this is a known Xbox-specific issue?

I’m using Xbox Series X + MSFS 2024 + iniBuilds A350. The problem occurs when starting the aircraft from a Cold & Dark state. I follow the normal startup procedure and import my SimBrief flight plan through the EFB. Flt Ops Sts and Load Sheet information both load normally. However, when I perform FPLN Request on the FMS, it remains stuck on “Pending Request” for about 20 seconds and then automatically returns to the previous screen. The flight plan is never loaded. I have repeatedly tried various troubleshooting methods, including re-importing the SimBrief flight plan, restarting the aircraft, reloading the flight, sending the FPLN Request again, switching through CAPT OIS/Center OIS and then importing again, as well as other related settings and procedures. I believe I have already tried pretty much all of the obvious troubleshooting steps. I have also seen other Xbox Series X players on YouTube using this function successfully, so I’m wondering whether this could be related to corrupted A350 data, cached data, saved aircraft data, or an Xbox-specific bug. If anyone knows how to completely reset the A350 data or fix the FPLN Request getting stuck on Pending, I would really appreciate your help.