
An article about the Piaggio incident on the Lower Hudson Online news website says that trouble with the aircraft's landing gear was reported at around 08:00 AM local time. The aircraft landed safely about a half hour later, but then blocked the main runway for several hours.
The HPN main runway remained closed until about 11:30 AM, when the aircraft was towed away. The runway closure caused a number of commercial flights to be delayed.
Earlier this year, the main gear of another Piaggio P180 Avanti collapsed during the aircraft's landing roll at Florida's Fort Lauderdale-Hollywood Airport.
UPDATE August 11, 2007: The EMTBravo Network has posted a set of photos of the gear up landing of this Piaggio P180 Avanti at HPN. Congratulations to the photographer for catching that spectacular series real-time of shots.
[Photo Source]