Something similar happened to my in-laws a few years ago. One night they were watching TV when there was a knock at the door. Imagine their surprise when they found the FAA on the other side. First off, they lived (recently moved) very near Hobby Airport in Houston. It turned out that several flights reported receiving signals from the ground that were interfering their radios. Well, using their "secret-agent-signal-tracking-toys" they tracked it to my in-laws house. After some questioning and a search of the house, the FAA found a "leak" in a TV cable line in the attic of the house. After a quick, cheap fix, all was well.
It is absolutely amazing how a small "leak" can affect commercial air traffic that easily!