SEA04LA110 · Quicksilver MXL
Quicksilver MXL · Accident: loss of control in flight
From Mountain Home, ID to Fairfield, ID
Event
- NTSB case
- SEA04LA110
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 1 · all aircraft and ground
- Ground fatalities
- Unknown
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Quicksilver MXL
- Aircraft type
- Quicksilver MXL
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- UNREG
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Mountain Home, IDTo Fairfield, ID
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- Unknown
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Loss of control in flight
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Pilot in command › Aircraft control, not maintained
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
Prior to the accident, the pilot landed at a road-side truck stop to take on automobile fuel for the operation of his unregistered two-place ultralight-like aircraft. Records show that he refueled at 0910, and witnesses said that he took off from a road beside the truck stop about 0930. After takeoff, the pilot flew past a private airstrip about a mile from the truck stop, and then headed in the direction of his destination, where a gathering of ultralight-like aircraft was taking place. About 30 minutes later, an individual on the ground came upon the wreckage of the aircraft near some hilly terrain. There were no witnesses to the impact, and there was no fire. The entire aircraft structure was located together, and there were no ground scars indicating any movement across the terrain after the initial impact. An examination of the aircraft structure did not find any indication of an in-flight structural failure, nor any evidence of an engine malfunction. It was determined however that the wing washout angle had been changed by the pilot so that the aircraft would cruise at a faster speed. It was also determined that since the pilot had made the washout angle change, and added a large windshield to the airframe, the aircraft's cruise speed was only about 10 knots greater than its stall speed. The investigation also revealed that there had been very strong gusty winds (to 20 knots) and turbulence in the area the pilot was flying through. It was the opinion of the FAA Inspector who responded to the scene that the pilot had lost control of the aircraft while trying to continue his flight in the windy/gusty conditions.
Probable cause
The pilot's failure to maintain aircraft control during an undetermined in-flight operational phase resulting in an uncontrolled descent into the terrain. Factors include strong gusty winds in the area of the accident.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record SEA04LA110
- Event ID
- 20040702X00900
- Case number
- SEA04LA110
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: e1455efef776e508c229b164cfe87a5c4b7bf0a8e6e4e2fd8e8b4bb0cd3cf012; retrieved 2026-09-20T18:26:29.086Z.