Hi,Finnair has a check "Stabilizer trim - 4 UNITS" in their after landing checklist. (which also is in my 757 checklist that I created for use with PIC)This makes me wonder. When I taxi in, and do the after landing flows after shutting down the engines (including turning off all demand hyd pumps and pri elec center pumps), the trim creeps back to 7 UNITS. This happens after the said hydraulic pumps have been turned OFF.What's the point in putting the stabilizer to 4 UNITS, when during after shutdown flows it goes to 7 UNITS and stays there, until hydraulic pressure is again available to the stabilizers and the trim can be re-set for a new flight ?Does the 757 NOT reset the trim to 7 UNITS after hydraulics are shut down, or is there some more elegant reason to that check, other than setting the stabilizer to some figure that is close to normal stabilizer settings for takeoff (in case it is missed in preflight flows and checks) ? And anyway, what's the point if it always goes to 7 UNITS after hyd shutdown ?Tero

Tero,could this be an issue within FS itself?

Hi!This is because the hydraulic system of 767PIC isn't 100% accurate.The trim will not move (on the real aircraft) when no hydraulic pressure is available. Both ailerons and both elevators will drop as hyd. pressure decreases due to gravity. The rudder can move aswell, depending on the wind. The trim however will maintain its position.Unfortunately, this has an unpleasant effect in the air (in 767PIC): if you loose all hydraulic systems, the aircraft will pull 99G's as the nose flies up because of the trim jumping back to its "default" position.If I remember correctly, the elevators as well as ailerons will move upwards when no hydraulic pressure is available. The stabilizer will not move.Maybe this will be looked into with the new 767 (although I am pretty sure it is very tough to make this work right as FS has no clue that hydraulics exist)Regards,Mark

Mark(s) :)In PIC, if no hyd. pressure available, none of the controls will move. So that is modelled correctly.But... the trim will jump :(. Thanks for the confirmation about the real jet, that's what I thought.Another one to the "fix" list.Tero

"In PIC, if no hyd. pressure available, none of the controls will move. So that is modelled correctly."Almost, yes. :-)The speedbrakes seem to be "mental-force" powered in PIC. ;-)Regards,Mark

:-hahTero