I was just flying into Memphis when everything went all wrong. The autopilot refused to reduce speed and I couldn't change it manually resulting in a go-around (too close to the runway to salvage the approach). Second attempt, the LAND mode did not engage even though G/S and LOC were blue and the aircraft lazily drifted off the NAV track even when in NAV mode, a second go-around. During the second go-around, the thrust did not reduce and remained at TOGA power even when I leveled off at the miss approach altitude sending my speed nearly through Vne. At this point I just took manual control of the thrust. Third time the charm! This time, I was able to land after doing an extended 22-mile final. during the downwind, I played around with the autopilot, but it flat-out refused to cooperate and did not give me any sort of manual control over the speed so I just disconnected it altogether.

This was all done in IMC at night. Flying V 1.0.3

Edited January 24, 20242 yr by willwest43

This has also happened to me on my last 2 flights.

Would be nice to know what causes it and how to avoid it.

Taking a guess, this was probably caused by a known issue with the CPT side DH window. If that one is active, the speed window will always be dashed, making speed control impossible. Use the F/O side DH window until the next patch 🙂

Please lemme know if this fixed your issue 🙂

Thanks for the reply!

On my last 2 flights I did have an altitude in the Cpt's side DH window.

This evening I'll try another flight leaving that window empty and report back with the results.

Regards,

Scott

Good evening (at least it is evening where I'm at)!

I'm happy to report I just flew a flight from VTBD- WSSS, left the DH windows empty, and did not encounter any A/P or A/T issues.

Regards,

Scott

8 hours ago, Nico - Gumby said:

Taking a guess, this was probably caused by a known issue with the CPT side DH window. If that one is active, the speed window will always be dashed, making speed control impossible. Use the F/O side DH window until the next patch 🙂

Please lemme know if this fixed your issue 🙂

You are probably right. I saw a Facebook post this morning about the same thing and someone mentioned that the Captain's DH will cause an issue with selecting speed.

Let me know if it wasn't that issue please 🙂

11 hours ago, Nico - Gumby said:

Let me know if it wasn't that issue please 🙂

Sorry for the late reply. Yes, switching off the DH on the captain's side solved the speed problem. Looking forward to the upcoming fix 🙂

I had the same. I knew already of the DH speed bug, but thought it was only optical, because we could also (hope to) rely on the blue line for set speed on the speed tape. But apparently the DH bug not only prevents showing a set speed but also actually setting a speed.

Yep, just use the FO DH window until the next patch releases 🙂