Investigators from the Federal Aviation Administration and the National Transportation Safety Board are on Kauai probing the cause of a crash Tuesday of an ultralight aircraft in the Waiakamoo Valley in Polihale. The crash killed two people. Kauai firefighters were called just before 8 a.m. for a brush fire. When they arrived just before 9 a.m., they found the wreckage of the ultralight crash. Firefighters recovered the bodies of the pilot and passenger. Their identities have not been released, although officials confirmed the aircraft was owned by Birds in Paradise, which operates out of Port Allen Airport in Hanapepe. Friends identified the pilot to the Honolulu Star-Advertiser as Gerry Charlebois, the owner of Birds in Paradise. They say he was an experienced pilot and maintained his aircraft well. The other passenger is believed to have been a student.