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Atlas / NTSB / SEA83FU006

NTSB CAROL · Event

Event SEA83FU006

1983-07-04 HAPPY VALLEY, Oregon, United States Airport · S15 Serious 1 aircraft Status: Completed

Aircraft involved

Factual narrative

THE ULTRALIGHT COLLIDED WITH THE TERRAIN WHILE MANEUVERING DURING AN AIRSHOW. ACCORDING TO WITNESSES, THE PILOT HAD JUST EXECUTED A TOUCH-AND-GO LANDING AND COMMENCED A CLIMBING 180 DEGREE LEFT TURN TO DOWNWIND IN WHAT WAS DESCRIBED AS A WINGOVER TYPE MANEUVER. DURING THE TURN, THE VEHICLE WAS OBSERVED TO EXCEED 90 DEGREES OF BANK (LEFT WINGDOWN) AND A RAPID SLIP DEVELOPED. THE ULTRALIGHT WAS PLACARDED FOR A MAXIMUM ANGLE OF BANK OF 6O DEGREES. IT WAS OBSERVED TO DESCEND INTO TREES IN AN EXTREME LEFT WING LOW CONDITION. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1983_SEA83FU006.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.