Most vehicles have power door locks.. Some even have child safety door lock features..

For myself, it would be unbelievable if airplanes didn't have power door locks, with safety mechanisms preventing doors to be open on flight..

No. There is no automatic system for locking doors. That would be a potential safety hazard in emergency evacuation situations. In the event the system failed and prevented a door from opening, pax could be trapped in a fire or water landing situation. Except for the 767, all doors are manually operated.

Comparing automobile and aircraft doors is like comparing apples and oranges.

They do. Its called the laws of physics in the form of air pressure.

I think we've established that it's going to be physically impossible to open the door inflight to begin with, so that's a non-issue. And why would airplanes have locks simply because cars have them?

Why have such a big door handle if its purpose is not leverage??? Its whole purpose is to convert a human force into a larger force.

If someone went for the door lever in the middle of a flight I was on I'd chin him/her. Simple. I don't want to be the one getting interviewed on Myth Busters...

There is a requirement for some leverage in just operating the locking mechanism to release the door from its closed and locked position. There are also some doors that require the leverage to lift the door a small amount so that the full weight is on the hinge for opening.

There is an option for a key lock in the external door handles to secure the plane while unattended. These would be a lock similar to one on a lockable storage box and is only designed to lock the outer handle in a closed position from the outside.

But still, that doesn't mean the handle, leverage or otherwise, is used to separate the door from the hull of the plane, and enable someone to depressurize the cabin at high altitude.

I guess having a manual lock safety feature would defeat the purpose of preventing someone rogue attempting the door anyways..

Nothing is impossible.. but yes its established to be highly unlikely I agree..

Still was big news, someone going at the handle trying to open the airplane door during flight..