AT diverts to MEM after pax tries to open door inflight.

[ron burgundy]

The overwing emergency exits lock when all of the following occur:
● Three of the four entry/service doors are closed.
● Either engine is running.​

● The aircraft air/ground logic indicates that the aircraft is in the air or both thrust levers are advanced.

So, if you do a single engine takeoff, with a door open..you are still safe..can't open the overwing exit.

 

[ImbracableCrunk]

Air pressure from the cabin also prevents the handle from being operated. It's not just an electronic system.

 

[scoreboardII]

Air pressure from the cabin also prevents the handle from being operated. It's not just an electronic system.

on an NG, the door opens out. FRM does not mention air pressure as a method of latching.