Engines must be either both running or both stopped
(Both engines running and stable.)
No1 ECL must be at GRD IDLE
(1 back)
No2 ECL must be at MAX
(2 forward)
If both engines are running, ensure No2 engine is above 95% Nf
(No2 above 95%)
and No1 has a positive Nf split.
(No 1 a positive split)
Post MOD 720, the Accessory drive switch can function only if the generators are both on-line or both off-line.
(Correct, some used it as a check, but it was never taught as one and IIRC never appeared in the FRCs)
I always used to teach that if you couldn't rest your hand on the No1 ECL as you touched the ACC to Main switch, then something was wrong.