OP DES
Except that the FCTM says selected speed must be flown there's no reason given as to why. So if you have any document it would be nice to have. As far as Direct Law is concerned except B+G where STATUS tells you to switch off ATHR I haven't seen anything regarding G+Y or any other. Rather explaining abnormals it says even with loss of AP, the ATHR may be available. Although I can see some merit in manual thrust. The GS mini activation as a cause we are offcourse logically guessing. But strange as it may sound the ATHR has nothing to do with GSmini function. GSmini requires only APP phase and Managed speed. So, even if you switch off the ATHR your Vapp will shift but it will not be flown since thrust won't respond to it, unless you move it manually. When under pressure of abnormalities flying 15 or 20 kts below Vapp will make anyone very uncomfortable. Only Select Speed will freeze the Vapp target. Good to have any other information.
Last edited by vilas; 2nd Aug 2021 at 07:04.