LAX93LA331 · Ultimate 10-80
Ultimate 10-80 and R. J. McNaul BEAVER RX-550 BEAVER R · Accident: in flight collision with object on approach
Event
- NTSB case
- LAX93LA331
- 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
- 0
- 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
Aircraft 1 · Ultimate 10-80
- Aircraft type
- Ultimate 10
- 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
- N51677
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From not recordedTo 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
- Approach · VFR pattern final
- 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
- In flight collision with object
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Minor
Aircraft 2 · R. J. McNaul BEAVER RX-550 BEAVER R
- Aircraft type
- R J Mcnaul BEAVER RX-550
- Category
- Ultralight
- 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
- N38RJ
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From not recordedTo 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
- Takeoff · roll/run
- 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
- On ground/water collision with object
- 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 › VFR procedures, not followed
- Pilot in command › Visual lookout, poor
- Pilot of other aircraft › VFR procedures, not followed
- Pilot of other aircraft › Visual lookout, poor
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
THE AMATEUR BUILT EXPERIMENTAL AIRPLANE PILOT ANNOUNCED HIS POSITION AS HE ENTERED THE TRAFFIC PATTERN. WHEN ON THE DOWNWIND LEG, THE PILOT OBSERVED A REGISTERED ULTRALIGHT AIRPLANE TAXIING TOWARD THE RUNWAY. AS THE EXPERIMENTAL AIRPLANE TURNED ONTO THE FINAL APPROACH, THE PILOT OBSERVED THE ULTRALIGHT STOP AT THE RUNWAY THRESHOLD. THE EXPERIMENTAL PILOT WAS REQUIRED TO FLY THE FINAL APPROACH AT A SLOW AIRPEED WITH A HIGH ANGLE OF ATTACK AND A HIGH RATE OF DESCENT IN ORDER TO CLEAR THE WIRES THAT CROSSED THE FINAL APPROACH COURSE. WHEN THE EXPERIMENTAL AIRPLANE WAS NEARING THE RUNWAY THRESHOLD, THE NONCERTIFICATED PILOT FLYING THE REGISTERED ULTRALIGHT AIRPLANE ENTERED ONTO THE RUNWAY AND WAS STRUCK BY THE LANDING AIRPLANE.
Probable cause
the noncertificated pilot's failure to follow the prescribed vfr procedures and poor visual lookout. The other aircraft pilot's restricted visual lookout was a factor in this accident.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record LAX93LA331
- Event ID
- 20001211X13182
- Case number
- LAX93LA331
- 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: ddefe331d329a3ae0d79c807ccb130c6fb463fe7eda2d5112ba29e4a8f737438; retrieved 2026-09-21T14:10:15.085Z.