Hi all,since installing the service pack for the 777 i cannot trim up using my ch yoke, i can see the trim switches working in the VC but it will not trim up to set trim for take off.I can move the trim lever by clicking it to set the trim.There is no problem in the ngx, md11 or 747 so it is not a problem with my hardware,any help would be much appreciated

 

 

Gary Stallard

First guess is ensure you are not using pre-SP saved panel states.

Also make sure your yoke is centered. I had the same issue with the 200LR back in February and I found my yoke was commanding slight nose up so it wouldn't allow my nose down trim input on the ground.

Thanks for your help guys,it was the yoke not centered cheers Adam

 

Gary Stallard

I'm glad my limited knowledge/experience could help someone else. There's something in the FCOM about the A/C not allowing trim inputs that oppose the elevator commands. I can't remember if it applies only on the ground or not though.

 

Glad you got it sorted!