Fly from Portland wrote on Mar 4^th, 2016 at 1:44am:

Does anybody know if this message is supposed to happen when you extend them when drag is required. Right now it is not happening, but it does give the message on the ground, why not in the air. :P

The message "SPËEDBRAKE extended" should appear on Eicas in the AIR if thrust levers are not closed !

From 777 FCOM: "Eicas message SPEEDBRAKE EXTENDED(+aural beep): Speedbrake is extended when radio altitude is between 15 and 800 feet, or when the flap lever is in a landing position, or when either thrust lever is not closed"

On the CS777, when airborne, the message appears only in the first 2 conditions (Ra between 15 and 800, plane in landing configuration)
It is MISSING on the third one (thrust lever not closed) . This can be annoying sometimes.

But otherwise imho the CS777 has reached a quite GOOD LEVEL now with V1.7 !  :)

Guy