Stall issue on route in Australia
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I tried this route from Perth to The Granites last weekend and trying again this morning. Here is the route information from Simbrief.
YPPH/21 AMANA5 AMANA Y31 LAKIR Y69 LEO DCT WBR DCT SCHEE DCT YTGT/TG2EG.R29
Recommended optimum of FL330. Last weekend I got the flight going and walked away for a bit after 20 minutes. I came back 20 minutes later to find the plane upside down on the ground. I did the same flight attempt again this morning and it happened again. It appears that at or after waypoint YOKRA, not long after reaching FL330, the plane veered off to the left and crashed.
I tried the flight a second time this morning, this time sitting at PC and monitoring to that same exact location. After a short period at FL330, the plane struggled for speed, almost stalling, and auto thrust kicked into TOGA with no help. I disconnected A/P and ATS but it continued to do the same thing once connected again. I had to descend to FL310 for stability. Is this something wrong with the plane or the inability to fly at that cruise flight level even though it says optimum was FL330?
I have done other flights at FL330 with no issues, although this route has an extra 2 or 3 tons to fuel. If that is the case, I would expect the optimum flight level to be below FL330.
Any ideas? Thanks.
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The MAX/OPT flight levels displayed on the FMS PROG page should definitely be achievable at the gross weight entered into the FMS. However, I do recall seeing another user reporting a similar behaviour previously, and that was caused by a third-party weather program generating unrealistically high temperatures at high altitudes. So the first thing that comes to mind is to double-check that the temperature is within approx. IAS +/-15℃ at high altitudes.
Aside from that, we'd really need more information before we could provide a more definitive response. If you see that behaviour again, could I kindly ask you to raise a support ticket with Just Flight Support at the following link: https://www.justflight.com/support
In the ticket, could you please include any screenshots/videos of the behaviour and attach the log file generated by the product. That will ensure our support team has enough information to be able to assist further.
Instructions for locating the log file can be found here: https://support.justflight.com/en/support/solutions/articles/17000152594-where-to-find-the-log-file-s-
Mark - Just Flight
