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Atlas / NTSB / SEA91LA031

NTSB CAROL · Event

Event SEA91LA031

1990-12-09 BOZEMAN, Montana, United States Airport · BZN None 1 aircraft Status: Completed

Aircraft involved

Probable cause & findings

THE FAILURE OF THE RIGHT ENGINE MASTER ROD.

Factual narrative

A BEECH 3NM SUSTAINED SUBSTANTIAL DAMAGE WHEN THE RIGHT ENGINE MASTER ROD FAILED AND THE CRANKSHAFT SEIZED. THE PROPELLER SEPARATED AND STRUCK THE NOSE OF THE AIRPLANE, DOING STRUCTURAL DAMAGE AND SHEARING OFF A NOSE FUEL TANK. THE PILOT RETURNED SAFELY TO HIS DEPARTURE POINT. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1990_SEA91LA031.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

What the literature says.

Academic papers and agency reports matching this event's aircraft type. Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.

Browse the full corpus — academia portal ↗