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Atlas / NTSB / SEA89LA178

NTSB CAROL · Event

Event SEA89LA178

1989-09-26 PORTLAND, Oregon, United States Airport · PDX Serious 1 aircraft Status: Completed

Aircraft involved

Probable cause & findings

THE PILOT'S POOR INFLIGHT PLANNING. CONTRIBUTING TO THE ACCIDENT WAS THE WAKE TURBULENCE AND REMEDIAL ACTION NOT POSSIBLE.

Factual narrative

AT THE END OF A CROSS COUNTRY FLIGHT, APPROACHING THE AIRPORT, THE PILOT WAS CLEARED TO LAND AND CAUTIONED OF WAKE TURBULENCE FROM A LARGE AIRPLANE LANDING AHEAD OF THE ACCIDENT AIRPLANE. THE PILOT WAS INSTRUCTED TO KEEP A TIGHT PATTERN AND FOLLOW THE LARGE AIRPLANE. WHILE ON SHORT FINAL THE ACCIDENT AIRPLANE ENCOUNTERED THE WAKE TURBULENCE OF THE LARGE AIRPLANE. THE PILOT WAS UNABLE TO MAINTAIN CONTROL AND COLLIDED WITH THE TERRAIN SHORT OF THE RUNWAY. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1989_SEA89LA178.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 or causal vocabulary (wake turbulence, turbulence). 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 ↗