Nope! Cant see it myself but am always prepared to be corrected with the appropriate Boeing Refs;
Once the alternate flap master is armed the TE bypass valve is locked out and the LE retract fuse shuts, keeping the LE devices out. THE TE flaps must be, after removing all hydraulic power, electrically cycled, which results in the resetting of the LE fuse through the leading edge control valve.
So, I assume Bill whatsit is suggesting leaving the flap lever in the Take off position, then doing some disabling of system B, then arming the alternate system, How is the LE fuse reset to allow retraction?
Is this a bit like saying we can pull the RUN PWR CB to get the gear up!