Whatever damaged roofs on two homes in a Valley Stream neighborhood early Saturday wasn't blue ice, the Federal Aviation Administration said.

Two FAA investigators Tuesday checked roof damage at the homes in the 100 block of Home Street and found no blue residue around sections of damaged roofs. The residue would be a signal that blue ice fell from an aircraft flying over the homes, said FAA spokeswoman Arlene Salac. "It's kind of a little mystery," Salac said. "Unless we have another date and time to look at, we're done with it."

Blue ice is airplane lavatory water that leaks from malfunctioning aircraft plumbing, freezes and falls to the ground.

Lois Farella said Tuesday that she heard a crash on the roof of her home about 3:30 a.m. Saturday. When daylight came, she said she found roof damage and suspected that something fell from a jet.

The homes are near Kennedy Airport, the residents said. But Salac said the nearest plane was 3 miles away.

"We have a huge hole in our roof," Farella said.

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On Saturday, winds at Kennedy were 33 mph. Average wind speed is 16 mph, according to the National Weather Service.

Ann Marie Grace's roof also sustained damage, which included missing roof shingles.

"I'd like to know what happened," Grace said.