SEA02LA126 · Cosmos Phase II
Cosmos Phase II · Accident: loss of control in flight en route
From Deer Park Airport (DEW) to an unrecorded destination
Event
- NTSB case
- SEA02LA126
- 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
- 0 · 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
Cosmos Phase II
- Aircraft type
- Cosmos PHASE
- Category
- Weight-Shift
- 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 Deer Park Airport (DEW), Deer Park, WATo not recorded
- 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
- En route · climb to cruise
- 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
- Reason for occurrence undetermined
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
The non-certified pilot was operating an unregistered experimental Cosmos Phase II Trike. A witness to the accident reported that the aircraft entered a left turn shortly after departing the runway. He reported that the aircraft reached an altitude of approximately 200 feet above ground level (AGL) and then began to descend. The aircraft continued a descending left turn until it impacted terrain. The witness reported that this was the pilot's first solo flight in the accident aircraft. During a telephone interview, the pilot reported that he was unable to recall any of the detailed events surrounding the accident.
Probable cause
Loss of control for undetermined reasons.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record SEA02LA126
- Event ID
- 20020715X01124
- Case number
- SEA02LA126
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (5)
- 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: local date, investigation status, coordinates. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 2002-07-10.
- API snapshot SHA-256: a26c3bd079413097b5fba48f070b891051dd1a7b7b8f15c3cc576a46a1ac8f52; retrieved 2026-09-21T09:37:21.967Z.
- Corrected after a review of the NTSB narrative and the aircraft's make and model, which establish these values: aircraft category. Cosmos Phase II is a weight-shift (trike); the manufacturer builds nothing else. The NTSB MDB codes it AIR (Airplane), which is how the aircraft was registered rather than what it is.