The PFD shows .820, PERF CRZ shows .82, and the FPLN shows .81 for the next and all subsequent waypoints. Does it consider varying ECON speeds as the ISA deviation, head-/tailwind component, FL, and weight change?

Hi,

Thanks for your report. I will forward this to the team for further clarification.

Thanks again!

16 hours ago, spottersim said:

The PFD shows .820, PERF CRZ shows .82, and the FPLN shows .81 for the next and all subsequent waypoints. Does it consider varying ECON speeds as the ISA deviation, head-/tailwind component, FL, and weight change?

This is an issue I have reported on the A350 since release.
It is really disappointing to see yet another aircraft release with the same issue (it is also on the A340).

6 hours ago, dectenor2 said:

This is an issue I have reported on the A350 since release.
It is really disappointing to see yet another aircraft release with the same issue (it is also on the A340).

Same here... I would really appreciate it if the team actually committed to fixing these bugs.

On 9/23/2026 at 9:18 PM, dectenor2 said:

This is an issue I have reported on the A350 since release.
It is really disappointing to see yet another aircraft release with the same issue (it is also on the A340).

Can confirm this has been logged and fixed in v1.2.7, along with everything you have previously reported to the team. (I have also made them aware that issue persists on the 340 & 380)

I haven't had the opportunity to thank you for your detailed reports, so Thank you!

27 minutes ago, iniKyle said:

Can confirm this has been logged and fixed in v1.2.7, along with everything you have previously reported to the team. (I have also made them aware that issue persists on the 340 & 380)

I haven't had the opportunity to thank you for your detailed reports, so Thank you!

Oh that’s just brilliant news.

Thanks so much. Looking forward to trying it when it’s out!

The latest changelog mentions the following:

FIXED ECON SPD mismatch

Unfortunately, this does not seem correct.

On ground: .83 shown as cruise speed on FPLN page, .85 shown on CRZ page (seems to refer to the speed at/after the first STEP), speed changes with S/Cs

In flight: Cruise speed .85, but WPT prior to STEP shows .83 (please verify whether the aircraft resumes the original climb schedule for a cruise climb), no more speed changes throughout the FPLN, regardless of HWC/TWC, ISA, and FL changes.

Edited so the info below can be used with shot above.

Edited 14 hours ago14 hr by dectenor2

@dectenor2

That display value and FMGS calculation are actually correct, let me correct that:

1. Speed / Mach Calculation: At FL250, an indicated/calibrated airspeed (IAS/CAS) of 281 knots accurately translates to M0.67 (Assuming FL250 ambient pressure of ~376 hPa and a local speed of sound around 602 knots, 280 kt CAS gives roughly M0.672). Rather, my point was the inconsistency in Managed SPD/Mach. At FL250, past the T/C, the system should be holding M0.67 instead of displaying 281 knots, as it ought to be in Mach mode during cruise (Refer to DSC-22-FMS-10-50-20 or Highlighted Picture below).

2. T/C Target Speed: The Top of Climb (T/C) is the pseudo-waypoint marking the transition from the climb phase to cruise. Therefore, the target speed displayed here should be cruise speed, not climb speed.

3. SPD LIM Missing: The (SPD LIM) disappears because there is a FLT PLAN DISCONTINUITY in your FMC. Once you clear the discontinuity and connect your flight plan continuously to the destination, the (SPD LIM) waypoint will reappear on the ND/FMC.

Hopefully, this clarifies what's going on each time you fly this route/aircraft.

Cheers!

Edited 22 hours ago22 hr by OxkyGThaib

2 hours ago, OxkyGThaib said:

@dectenor2

That display value and FMGS calculation are actually correct, let me correct that:

1. Speed / Mach Calculation: At FL250, an indicated/calibrated airspeed (IAS/CAS) of 281 knots accurately translates to M0.67 (Assuming FL250 ambient pressure of ~376 hPa and a local speed of sound around 602 knots, 280 kt CAS gives roughly M0.672). Rather, my point was the inconsistency in Managed SPD/Mach. At FL250, past the T/C, the system should be holding M0.67 instead of displaying 281 knots, as it ought to be in Mach mode during cruise (Refer to DSC-22-FMS-10-50-20 or Highlighted Picture below).

2. T/C Target Speed: The Top of Climb (T/C) is the pseudo-waypoint marking the transition from the climb phase to cruise. Therefore, the target speed displayed here should be cruise speed, not climb speed.

3. SPD LIM Missing: The (SPD LIM) disappears because there is a FLT PLAN DISCONTINUITY in your FMC. Once you clear the discontinuity and connect your flight plan continuously to the destination, the (SPD LIM) waypoint will reappear on the ND/FMC.

Hopefully, this clarifies what's going on each time you fly this route/aircraft.

Cheers!

Thanks for your input. It would be great if ini managed to fix this in the A380, A350, and A340 consistently.

Thanks everyone. Have logged this with the team to review again.

Thanks again for your patience and troubleshooting!