I don't know if it was fixed already in previous revisions, but I can order units to attack when they are unpowered, and they play their attack voices when I do so (they don't attack, however). Also, if a jumpjet aircraft won't crash due to no power (I made mine that way intentionally) and it has a turret, then it spins when I order it to attack, and returns back to its starting position after it fails (because it is still forbidden to use its weapons).
I don't know if it was fixed already in previous revisions, but I can order units to attack when they are unpowered, and they play their attack voices when I do so (they don't attack, however). Also, if a jumpjet aircraft won't crash due to no power (I made mine that way intentionally) and it has a turret, then it spins when I order it to attack, and returns back to its starting position after it fails (because it is still forbidden to use its weapons).
Tested in revision 1015.