Originally Posted by
JammedStab
Autothrottle wake-up is a customer option. Based on that, it is possible that not all 777's have it.
The only state where the autothrottle wakeup function is potentially active is when there is no mode. There is no mode when the display on the FMA for the autothrottle mode is....blank. But if it is blank and you are also in FLCH or TOGA, A/T wake-up will not activate when the other required activation conditions are met.
Originally Posted by
Houba
From the NTSB report: "Automatic engagement functions when the AFDS is in a compatible pitch mode or no mode..."
When I say that autothrottle wake-up is potentially active when there is no mode...I mean no autothrottle mode. In other words, when the FMA is blank for the autothrottle, there may be wake-up capability. The compatible pitch modes that allow this capability to function are those other than FLCH or TO/GA and includes no pitch mode displayed in the FMA.