The person at the center of this case
Nichol Paul Sias
Missing Person · Open
30 years waiting · since 1996
Missing Person: Nichol Paul Sias
Justice for Nichol Paul Sias — the trail went cold in 1996, but the truth hasn't.
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Key leads to think about
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vehicle
Lead #1What caused the aircraft to crash in Constantine Bay when it was only scheduled for a 20-minute flight to Dutch Harbor?
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evidence
Lead #2What condition was the recovered wreckage in, and why was only part of the plane found?
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person
Lead #3What was the status and experience level of pilot William Cork, who was also aboard?
Nichol Paul Sias, a 58-year-old pilot, disappeared on August 11, 1996, when his white Grumman Turbine G-21A Goose aircraft departed Anderson Bay for a 20-minute flight to Dutch Harbor with fellow pilot William Cork. Part of the plane was discovered on a beach in Constantine Bay, approximately 6 miles northeast of Unalaska, suggesting a crash occurred during the flight. Despite the discovery of wreckage, the full circumstances of the disappearance and the fate of both occupants remain unresolved after decades.
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More leads to consider
Beyond the top three above — each detail below could be the thread that pulls this case open.
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location
Lead #4Why did the aircraft deviate from its intended flight path to Dutch Harbor?
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Even the smallest detail could be the key to solving this case.
Official wording
Source Narrative
NamUs case MP67004. Missing person: Nichol Paul Sias.
Last known contact: 1996-08-11 in Dillingham, Dillingham, AK. Circumstances: Nichol and William Cork, MP #67268 are missing in a white Grumman Turbine G-21A Goose plane with tail number N660PA that departed Anderson Bay at 1610 hours on a 20-minute flight to Dutch Harbor.
Part of plane was found on the beach in Constantine Bay about 6 miles northeast of Unalaska. Demographics: 58 years, Male, White / Caucasian.
Physical description: 6 ft 6 in, 190 lbs, hair: Brown, eyes: Blue. Investigating agency: Alaska State Troopers | 960056737.
Timeline of Events
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1996-08-11
16:10Aircraft departure
White Grumman Turbine G-21A Goose (N660PA) departed Anderson Bay with Nichol Paul Sias and William Cork on a 20-minute flight to Dutch Harbor
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1996-08-11
Wreckage found
Part of the aircraft was discovered on the beach in Constantine Bay, approximately 6 miles northeast of Unalaska
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:August 11, 1996 at 4:10 PM
Last Updated:June 17, 2026
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Phone: 9072695511
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Case Information
Incident:August 11, 1996 at 4:10 PM
Last Updated:June 17, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 9072695511
You can remain anonymous