The last 3 flights that I have made with my 737-900 I have lost control of pitch, it pitches up and out of control. This occurs at aprox 1 hour into the flight, and just at the start of the TOD. No failures are checked or scheduled. Could anyone give me a little advice, Thanks Randy

For advice, Randy, allot more information would be required.

Your operating environment for starters.

What windows version; Steam or not etc.

 Thank You for the reply, here is further info

 

GeForce GT720

AMD FX 4300 quad core

8gig Ram

M.S. Windows 10

Note, when I was running windows 8.1 I did not have this issue, I am thinking that it may be a bad file inside PMDG. I may need to do a clean install. Wait for a reply

 

Randy Harrill

Sorry I am not using Steam.

The only "file inside PMDG" is a dll and if that goes bad there is not a product. Don't do a clean install, instead lets figure out what is going on.

 

Confirm you have the current version of NGX, check the operations center to do this verification.

 

I keep reading your post and get more confused each time.  You lose control of pitch, is A/P engaged? Does it happen at one hour or at TOD, is it always happening or sometimes or rarely? Can you describe a scenario where it happens every time?

 

What are you using to inject winds into FSX?

Thank you for your reply,

Yes today I did check for the latest update we are good to go.

2 flights today KLAX-KLAS rout,

GABRE8.DAG GABRE8 DAG CLARR2 DAG.CLARR2

Just after TOD started (6min or so) an erratic pitch up occurred with A/P engaged VNAV disconnected, I manually pitched the A/C down and then a left bank roll  and A/P disengaged and I could not recover. My controls seemed to be not effective, (sluggish). Please let me know if this helped.

 

Randy Harrill​

Was the aircraft over speeding? Throttles were at idle?

Was aircraft on path and FMA indicated VNAV PTH as pitch mode?

You didn't answer the weather question, unrealistic winds could cause this.

 

Maybe a screen shot just before VNAV disconnects would go a long way in helping here.

 

I assume you realize there is not a bug in the aircraft causing this, but we are trying to figure out what is...

Thank You, I am going to re-do the flight and I will take a screen shot. Weather is not being used winds aloft is not being used,

 

No over speed, (that I know of)

Following VNAV path, all systems were working correctly. (I think)

 

Randy Harrill

After starting the flight VNAV LNAV engaged but I was not able to engage CMD A/B, not sure what is going on.

 

Randy Harrill

Most common issue causing that is forgetting to put generators on line.

Dan,

 

It sounds a lot like the ol' turbulence problem before the FSUIPC and Active Sky fix.

After starting the flight VNAV LNAV engaged but I was not able to engage CMD A/B, not sure what is going on.

 

Randy Harrill

Are you using a yoke or joystick.

Have noticed any issue with it at all.

(Control inputs, by you or a malfunctioning flight controller will keep ap from connecting)

(Just a thought)

Randy, are you using perhaps Acuffeel?   Sometimes if you set your Acuffel in a certain way, some planes behave like that or cannot even fly properly.

 

 

Cheers.

john goncalves