Skip to content

Atlas / NTSB / SEA04LA172

NTSB CAROL · Event

Event SEA04LA172

2004-08-21 Salmon, Idaho, United States Airport · SMN None 1 aircraft Status: Completed

Aircraft involved

Probable cause & findings

Directional control not maintained during the takeoff roll resulting in a runway excursion and subsequent nose over. Factors include a drainage ditch.

Factual narrative

On August 21, 2004, about 1000 mountain daylight time, a tail-wheel equipped 2004 Tubbs PA-18-225 DD, N7993A, sustained substantial damage following a runway excursion and subsequent nose-over at the Lemhi County Airport, Salmon, Idaho. The airplane is owned by the pilot and was being operated as a visual flight rules (VFR) personal/pleasure flight under the provisions of Title 14, CFR Part 91, when the accident occurred. The private pilot, the sole occupant of the airplane, was not injured. Visual meteorological conditions prevailed, and no flight plan was filed for the proposed flight. In a written statement the pilot reported that the airplane "veered to the left" shortly after commencing the takeoff roll. The pilot reported that corrective actions were taken, however, he was unable to correct the situation before the airplane exited the runway edge. After exiting the runway, the airplane encountered a drainage ditch and nosed over resulting in substantial damage to the left wing and vertical stabilizer. No preaccident mechanical malfunctions or failures were reported. The pilot reported that the winds were calm at the time of the accident. In a written statement the pilot reported that the airplane "veered to the left" shortly after commencing the takeoff roll. The pilot reported that corrective actions were taken, however, he was unable to correct the situation before the airplane exited the runway edge. After exiting the runway, the airplane encountered a drainage ditch and nosed over resulting in substantial damage to the left wing and vertical stabilizer. The pilot reported that the winds were calm at the time of the accident. No preaccident mechanical malfunctions or failures were reported. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_2004_SEA04LA172.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 (runway excursion). 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 ↗