What is this? (cord pulled from jetbridge onto plane) [Answer: Temperature sensor]
 

https://cimg3.ibsrv.net/gimg/www.fly...4a8e2c9abc.jpg

What's this thing that is stretched into the cabin while the jet bridge is attached?

I know what the little wheel thing that touches the fuselage is about (electrical ground).

It is a temperature sensor for the ground airconditioning.

When preconditioned ground air is connected to the aircraft, that sensor is placed inside of the airplane to provide cabin temperature to the ground air unit's thermostat.

The rubber wheel on the painted aluminum/composite material fuselage won't be a good electrical ground I suppose.
The wheel is used for the air bridge auto-leveling feature. When 100s of pax and containers get loaded (or unloaded) the landing gear springs/dampeners will get compressed and lower (or raise) the floor level of the plane. The wheel and auto-leveling will chase those height changes and make sure that pax won't have to step up/down onto the plane.

I always wanted to see what happens when somebody turns the wheel manually :)

Here's a Youtube video:

OK, a leveling sensor makes more sense than an electrical ground (the rubber wheel thing). Figured it was due to DO NOT TOUCH warnings. Conductive "rubber" exists, though.

Thanks!

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