The National Transportation Safety Board is investigating the emergency landing of an Air Excursions plane flying from Juneau to Gustavus Monday morning.

The Piper PA-32 Cherokee landed safely on a beach at Pleasant Island, about five miles short of Gustavus, at about 9:30 a.m., said Chris Shaver, air safety investigator with NTSB in Anchorage.

Shaver said the landing was forced by a loss of power to the engine. Federal regulations require Air Excursions pilots to…