Leaking Attic Furnace

[sightsandsounds]

I noticed this afternoon water dripping my attic furnace. The unit is covered in insulation that looks like foil, so I can't tell where the leak is coming from. There are just a few holes worn in the bottom of the insulation that are dripping water. I know nothing about this kind of stuff, so I don't know where to start.

Any ideas or suggestions would be appreciated.

[pushkins]

Is it dripping from a little white PVC pipe and into a metal tray under the air handler ?
The metal tray should have a hole and another pipe connected to it that goes to the exterior of the house.