Good point as I was thinking this myself. Not to spark a Boeing vs. Airbus tirade, (I actuall like Airbus), BUT if this had been on a Boeing, AND they dialed in the lower alt restriction into the MCP, the plane would have automatically started going down at the TOD. I guess though that could have brought about a whole different set of problems.
Not entirely correct. Even with a lower ALT in on the the MCP. The A/P will not begin a descent even at TOD on it's own..
On the 763, The FMC will disengage VNAV and enter ALT HOLD, and will not climb or descend unless V/S is activated and changed, or VNAV button is pressed again, OR FLCH is pressed.
On the 744, The ALT INTERVENE button must be pressed, OR FLCH mode engaged, OR V/S mode is selected.
I am NOT sure if different companys can have different configurations though.
See the Boeing engineers are not as stupid as you think