WPR23LA340 · Rutan Long-EZ
Rutan Long-EZ · Accident: landing gear collapse
From Livermore Municipal Airport (LVK) to an unrecorded destination
Event
- NTSB case
- WPR23LA340
- 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
- Event fatalities
- Unknown
- 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
Rutan Long-EZ
- Aircraft type
- Rutan LONG-EZ
- 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
- N58JB
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Livermore Municipal Airport (LVK), Livermore, CATo not recorded
- Aircraft age
- About 16 years (built 2007)
- 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
- Landing · landing roll
- Defining eventThe 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
- Landing gear collapse
- 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
- Aircraft › Aircraft oper/perf/capability
- Personnel issues › Action/decision
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
The pilot stated that when he touched down, the main landing gear contacted the runway surface, followed by the nose gear. He instantly heard a loud “bang” as the nose gear collapsed and the nose continued to settle, sliding down the runway surface.
Examination of the nose gear revealed that the nose landing gear actuator failed due to the buckling and fracture of the ball screw, which resulted from compressive loads on the actuator assembly. These compressive loads were likely from vertical and/or aft loads on the nose wheel. The actuator was likely in the fully extended position, but the length of the accident actuator was longer than its design length at full extension. Issues with the actuator installation that might have contributed to the overextension could not be determined.
The examination further revealed that the nose landing gear likely sustained a relatively hard landing while in the fully extended position. However, the additional length in the overextended actuator assembly made the ball screw susceptible to buckling failure from lower compressive loads than designed. Additionally, since less length of the extension tube was constrained by the housing in the overextended assembly, the reduced constraint likely made the assembly susceptible to buckling at even lower loads. The assembly’s extension beyond its design length likely contributed to the failure, as the extension would have diminished the safety margin and increased the vulnerability to buckling failure under high landing loads.
Probable cause
The pilot’s improper flair resulting in a hard landing.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record WPR23LA340
- Event ID
- 20230912193050
- Case number
- WPR23LA340
- Dataset
- full-current
- Source SHA-256
- 5cf380f0061817c0331a6b2d8cc7e0ee3a79bea469a1001dc5c10e56f35f5ab3
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, coordinates, cause areas. 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: c20394b0079e40428ec9e8e4d8300332359623eb783eab5ba8e56f22937bd7b0; retrieved 2026-09-16T18:06:52.528Z.