Here's an update on the ADP logic to add to the confusion....
My source tells me that he tried selecting Flaps 1 from Up on departure (in a 747-400 with GE engines)... and the ADP's did not run. This seems to fit the Boeing Maintenance Manual's "TE only" logic (on the ground with engines running). However, he tells me that when he went from landing config to UP in one go at the end of the flight, the ADP's didn't stop running until the flap indicator showed UP (i.e. LE's and TE's).
Perhaps there is some kind of EICAS indication delay, rather than a glitch in the logic? (e.g. after the TE flaps had stowed an electrical signal would have to be sent to the ADP via cards, wiring, etc and the ADP valve would have to close. The closed signal would then have to go to EICAS via wiring/computers, etc, to display the ADP-not-running indications. Perhaps by the time all this had happened, the inboard LE's would have already retracted?).
Rgds.
Q.