Hello captains,  I've hit a strange issue twice since yesterday on the 777F: after advancing the throttles to 50-55% N1 and then clicking TOGA, the aircraft will automatically reject the takeoff at 80 knots, without any warning on the EICAS or no aural warning with regards of wrong takeoff config or anything like that. I'm not using service based failure of any kind nor am I using any non-normal config.

 

Taking off with autobrakes off instead of RTO "cures" the issue.

 

Has this happened to any of you?

 

thank you

Enrique

 

EDIT: just a quick FYI: I'm not using any throttle hardware controllers, just the keyboard, so it's not a hardware sensibility or calibration issue.

I just had this annoying issue ruin an otherwise routine takeoff again this morning using the Freighter (FedEx Livery). I'm kind of surprised no one has reported this yet, as I've had this happen to me at least 3 o 4 times by now.

 

Anyone?

I'm not sure where I read this, but I was sure it was in the PMDG manual somewhere(?).Anyway, after you push TOGA, push your throttle(joystick-throttle that is) to full. It does not intervene the A/T or TOGA in any way. 

Check your hardware throttle is set to full power. Some hardware throttles have some spikes and this will disable your toga. Otherwise check in FMC that you can override throttle with hardware throttle if its on or yes set this to no or off. I think this will solve your problem. I had the same experience with my throttle and after FMC setup i have no problems.

I see he edited his post... If you are not using a throttle than something is commanding idle thrust once THR HOLD becomes active, what is the actual position of the throttles in the VC when you get a reject?

Nevermind

Hi guys, thanks for replying.

 

I am using a logitech gamepad for the control surfaces, and I don't have assigned any axis for throttle control both in FSX and FSUIPC. I am controlling the throttle just using the standard FSX keyboard assignments.

 

The sequence is: after lining up in the runway, I start advancing the throttles using the numeric keypad "9" key until the N1 white arc point towards the "red" indicator of the EGT (in the EICAS) to command 50-55% N1 as stated in the manual (it's a tip found either in the Tutorial or the Intro docs), then after both engines are stable, I press the key I have assigned for TOGA (Num keypad *). The mode annunciator goes from THR REF to HOLD and when reaching 80 knots it commands idle thrust and both brakes (autobrake RTO) would engage. It's always at 80 knots, no more no less!

I am however unable to reproduce this problem at will... it has hit me 3 o 4 times since I bought the T7. I use the freighter exclusively. This has happened to me using both the FEDEX and Lufthansa Cargo liveries, but not using the PMDG house colors... although I'm almost certain this bit of info is of no relevance.

 

I'm a bit clueless here because I am not using any hardware controller or any strange axis or button assignment using FSUIPC.

 

I see he edited his post... If you are not using a throttle than something is commanding idle thrust once THR HOLD becomes active, what is the actual position of the throttles in the VC when you get a reject?

 

 I will check it out next time I'm hit by this... but I'm almost certain the levers move back to idle in the VC.

 

Thank you!

regards

Hi! Any news about this topic? I have the same issue but I'm using Saitek X52 Pro so I will try to change settings in FMC like described in few post above. But it wold be interesting to know if Enrique has solved his problems.

Ciao

Does this still happen if you advance the throttles to full power, the A/T should still limit thrust to takeoff thrust. It might be worth checking eliminate control spikes in FSUIPC and seeing if that has any effect at all.

Hi, I flew the 777 today for the first time in 2 weeks only to be hit again with the same issue, this time flying the 200LR not the 200F.

I am becoming frustrated as this issue continues to bug my takeoffs... still can't understand why as I'm not using a throttle controller nor is any of the axis of my gamepad mapped either in FSX or FSUIPC.

 

I am attaching a screenshot of the moment the aircraft began it's RTO, throttles move back to idle and autobrakes warning comes up in EICAS. Here's also a link to a zip with the saved situation/panel state etc.

 

https://dl.dropboxusercontent.com/u/21613445/RTO.zip

 

Any help would be great!

thank you

-E

Any news on the issue? I'm also having the same problems as mentioned above.

No Throttle Controller Used, i'm using the fictive Austrian Airlines Livery, if this is any help

If not using Autobrake on RTO it works fine for T/O, but that shouldnt be the right way or

 

regards

Hi, Have you got FSUIPC.........If you havent then get it..........that will fix all your throttle problems.......

Hi, Have you got FSUIPC.........If you havent then get it..........that will fix all your throttle problems.......

or cause them!

Change your A/T override option in the PMDG Setup menus to NEVER (or whatever it is such that your "hardware" never overrides the A/T).

 

Basically, what is happening is that you're setting your throttle using key functions.  The A/T hits HOLD mode and the sim looks for your throttle hardware.  Since you have no real throttle hardware, it finds that there's no real thrust value set and assumes the throttle is at zero.

 

Throttle at zero means you closed the throttle and want RTO to kick in.

 

Change the value in the PMDG Setup to tell it not to look to your hardware at any time A/T is active and it should solve the issue.

 

 

 

As for the guy with the X52, the above should fix the problem, but will limit your ability to function to reject takeoffs.  My suggestion is to verify you're working properly in the takeoff flow:

Advance the throttle to ~55%, let it stabilize, hit TO/GA.  At that point, follow the A/T commanded thrust with your physical throttle hardware (helpful to have the "SHOW HARDWARE POSITION" option on, set to "WHEN MOVING" to assist in this).  Leave it there.  before T/D, pull it back to idle.

 

To be honest, I would've set the default to never allow the hardware to interact so that we'd have fewer forum posts about it, and those who really wanted the option (and therefore understand more of why it's there) could go find it...but I digress...

Hi Kyle,

Can't see the throttle settings that you are referring to.

Under FSX.Add-ons.PMDG there are only two lines, which read 'About' and '*About PMDG...'. They provide no throttle override actions.

Under FSX.Options.Settings.Controls I see no options for throttle override actions either.

Help!