Hey there Simmers,
Just a quick question, (an probably a bit daft) How do you engage the Pitot heat on the default 747-400?
I cant see a switch for it, is it just the "de-icing" toggle.
My assumption was the De-Icing was just for control surfaces / windshield etc.....
Or is there a keyboard assignment for Pitot heat?
The reason I ask, is that my Airspeed indicators are both going to Zero, after about 5 minutes of flying.... (my backup indicator also goes to zero).
I assume its the pitot, since failures were not the chosen option.
There isn't a pitot heat switch on the default panel. There is a keyboard assignment for it but i cant remember what it is. If you look in your settings on keyboard assignments it will be there somewhere.
Sorry i cant help more
Thanks for the fast reply!! I actually did a bit of fishing around at the same time as asking on here and have found a few helpful hints...
Shift+H will turn on the Pitot heat....
Seems a bit strange that no indication that the Pitot heat is "not" on, is given on the EICAS even when conditions dictate that it should...
I will give Shift+H a try later, but im pretty sure thats what it is, as on both occasions I lost my Indicated Airspeed Indicators, I was flying through cloud under "snow" conditions.
I cant imagine it would be anything else.....cant be a software glitch as it works fine on other models....(which do have Pitot Heat switches).