Last night started a transatlantic flight (KIAD-LSZH) with the PSS 777.Once at the first cleared FL, I switched to 4x simspeed, a thing I normally do on any long-haul flight of mine, which never gave me probs with any other a/c I've flown with (PMDG, Level-D, Wilco/FeelThere etc.)As soon as I switched to 4x simspeed the 777 went crazy, immediately losing altitude, pitch and heading control, despite the A/P and the A/T were still active.Sim-wise speaking, I went back to normal speed, switched A/P and A/T off and regained the control of the a/c manually (although hardly fighting against the out-trimmed horizontal stabilizer), after the 777 had lost 10000 ft of altitude in a while (from FL 330 down to 230) with heavy overspeed.Real life-wise, such an occurrence would have likely brought to passengers severely injuried (like the real QF72 flight) and even to a structural failure of the plane (like the real AF447 crash).Once the control was recovered, I turned A/P and A/T on, regained my cruise level and switched 4x simspeed again.Nothing strange happened this time, and the flight went on eventlessly until approaching the Ireland's West coast, when the weird thing happened again.Same procedure as before, and finally I landed in Zurich anyway.But - of course - such a things shouldn't happen at all.......Have any of you ever experienced a similar bug with the PSS 777?

Last night started a transatlantic flight (KIAD-LSZH) with the PSS 777.Once at the first cleared FL, I switched to 4x simspeed, Real life-wise, such an occurrence would have likely brought to passengers severely injuried (like the real QF72 flight) and even to a structural failure of the plane (like the real AF447 crash).

Just wanted to point out the humor in your post... Read those two lines... I switched to 4x simspeed. And then real life-wise.... You are right, no pilot in the real world would switch to 4x simspeed on a transatlantic crossing LOL...Furthermore, we do not know what brought down AF447, structural failure might have been caused by an explosion like the Qantas 744 last year where an oxygen tank exploded so to use that as your comparison example is a bit of a stretch...But to your point, I know there have been reports of this in the PSS forums, have you searched there? Personally, I have the PSS 777 and never use it at anything but 1x so I can not speak to your problem but even at 1x there are times where the desired VNAV altitude is deemed impossible (randomly) by the FMC and you can end up in a nasty dive unless you manage it with VS. I have seen this when leaving for long haul flights. Set everything up, LNAV/VNAV on departure and then there is no VNAV and you end up in a dive. I would imagine if that happens at 4x it would be pretty extreme. I would try and pay attention next time when it happens and if on the PROG page in the FMC your desired speed is BLANK instead of lit up .839 or .850 in Magenta that is your issue...Just something to look out for,-P

You are right, no pilot in the real world would switch to 4x simspeed on a transatlantic crossing LOL...

Humour in your posting too........ perhaps do they switch to 4x speed on short-haul flights? :( Thkx 4 your pointings.......I'll check for :( Anyway, not an appreciable thing by a product one has to pay for........ :(

Humour in your posting too........ perhaps do they switch to 4x speed on short-haul flights? :( Thkx 4 your pointings.......I'll check for :( Anyway, not an appreciable thing by a product one has to pay for........ :(

LOL, Touche, point taken... And I agree, not something I like either but as far as the 777 goes if you want full systems modeling or at least close PSS is as good as it gets unfortunately. Lets pray PMDG or LVL-D step up to a 777 for us... Keep an eye on that PROG page and your speed on the bottom of that page. If it goes blank you just lost VNAV... Funny thing is the FMC can be at FL350 and the FMC tells you OPT ALT is 370 so you dial in 370 for the Step and the FMC will not like it, your speed will disappear from PROG and you will lose VNAV but then you put in FL360 or 380 and VNAV will come back, it is nutty. There is definitely some buggy code in our 777's... ;) If you were flying in LNAV/VNAV when it happened try switching to manual speed intervention...-P

And I agree, not something I like either but as far as the 777 goes if you want full systems modeling or at least close PSS is as good as it gets unfortunately. Lets pray PMDG or LVL-D step up to a 777 for us... Keep an eye on that PROG page and your speed on the bottom of that page. If it goes blank you just lost VNAV... Funny thing is the FMC can be at FL350 and the FMC tells you OPT ALT is 370 so you dial in 370 for the Step and the FMC will not like it, your speed will disappear from PROG and you will lose VNAV but then you put in FL360 or 380 and VNAV will come back, it is nutty. There is definitely some buggy code in our 777's... ;) If you were flying in LNAV/VNAV when it happened try switching to manual speed intervention...-P

To say it all, I also don't like so much the excessively 'cartoonish' graphics of the 2D panel, esp. if compared with Level-D or PMDG 747.......About OPT ALT.......no, I haven't encountered any 'refusal' of an higher FL by the FMC, but the way OPT ALT is managed looks weird anyway.......nothing to do with the almost perfect OPT ALT management featured by the 'usual' Level-D and/or PMDG, both in ICAO and in custom mode (which latter is the one I mostly use, setting it at 2000). 'Unfortunately' you're right.......until someone else won't step into a newly developed 777 the PSS is as real.......ops.......as enough as it gets.

I also don't like so much the excessively 'cartoonish' graphics of the 2D panel, esp. if compared with Level-D or PMDG 747

I have quite the opposite feelings. I love the Baskatov-style graphics of PSS panels and always found PMDG (and also Level-D) 2D panel bitmaps as their significant disadvantages. No word about the quality of the simulation, of course, which is top notch.It's nice to differ sometimes. :( Especially that we're talking about aesthetic reception.Best regards

I have quite the opposite feelings. I love the Baskatov-style graphics of PSS panels and always found PMDG (and also Level-D) 2D panel bitmaps as their significant disadvantages. No word about the quality of the simulation, of course, which is top notch.It's nice to differ sometimes. :( Especially that we're talking about aesthetic reception.Best regards

Visual tastes are a personal matter of course.Not the same about the quality of the simulation: bugs like the one(s) I've described above (confirmed by psolk as well) are - as I said - not exactly the kind of things I'd wish to get with a product I've paid for.......Of course I don't want to make free overcriticism about PSS......I also have their 757 and the fact it's a newest product respect to the 777 is clearly visible........better graphics (the dome lighting is simply amazing) and a bug-free flight behavior (but the lack of illumination of the passenger cabin's windows in the exterior model could be easily avoided).An update of their 777 would be really appreciated but, unfortunately, their statement "Rising again in spring 2009" is still there, and summer begins tomorrow......