Unalaska, AK – A Pen Air plane crashed while landing on the Unalaska Airport runway late this afternoon.

The Grumman Goose hit a tractor trailer on Ballyhoo Road as it approached the runway at about 4:30 p.m., on a return flight from Akutan, according to the Unalaska Department of Public Safety. The pilot and the eight passengers onboard the plane at the time have not yet been identified, but emergency room staff at the Iliuliuk Health Clinic in Unalaska said that all nine of them were treated for only minor injuries, and were in stable condition an hour and a half after the accident. The driver of the truck had either minor injuries or none at all, according to Public Safety Department Sgt. Jennifer Shockley.

A Public Safety Department volunteer ambulance crew was called out to the scene of the accident, but called off when Pen Air transported the pilot and passengers to the clinic in one of the company's own vans.

The plane was lifted off the runway with a crane from Pacific Stevedoring at about 7 p.m. It appeared to have sustained significant damage, with much of the cockpit crushed and parts of the tail and landing gear badly battered as well.

Shockley said authorities were working to determine whether Pen Air had properly closed off the road to traffic as the plane approached. Both the National Transportation Safety Board and Department of Transportation are conducting an investigation.

Local Pen Air personnel referred all questions to the company's Anchorage offices, where calls placed this evening were not immediately returned.