On August 11, 1996, 58-year-old pilot Nichol Paul Sias, known as Nic, Nicol, or Nick Sias, disappeared after departing Dillingham, Alaska, on a short flight to Dutch Harbor. Sias, a White male with brown hair and blue eyes, was described as 6 feet 6 inches and about 190 pounds, and had missing fingertips on his left hand. He was piloting a white Grumman Turbine G-21A Goose, tail number N660PA, with one passenger, William Cork. The flight left Anderson Bay at 4:10 PM under visual flight rules to pick up a maritime pilot, but never reached Dutch Harbor.

Low ceilings and fog were reported in the area. The aircraft was reported overdue and an alert was issued at 8:22 PM; portions of the plane were later found on a Constantine Bay beach about six miles northeast of Unalaska. The NTSB investigated but could not determine a probable cause, and a multi-day search of islands and mountains was suspended after four days. Both men are presumed to have been fatally injured in the crash; the exact circumstances remain unresolved.