WPR12LA081 · MAS Events NEMESIS NXT
MAS Events NEMESIS NXT · Accident: loss of engine power (partial) en route
From Camarillo International Airport (CMA) to Camarillo International Airport (CMA)
Event
- NTSB case
- WPR12LA081
- 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
MAS Events NEMESIS NXT
- Aircraft type
- Mas Events NEMESIS
- 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
- F-WNXT
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Camarillo International Airport (CMA), Camarillo, CATo Camarillo International Airport (CMA), Camarillo, CA
- Aircraft age
- About 2 years (built 2010)
- 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 · cruise
- 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
- Loss of engine power (partial)
- 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 systems
- Personnel issues › Task performance
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
After a series of performance tests at cruise altitude, the engine of the experimental amateur-built airplane began to vibrate and lose partial power. Unable to maintain altitude, the pilot initiated a return to the departure airport. During the landing approach, he was unable to extend the landing gear with either the primary or backup systems. He attempted to perform a go-around; however, the airplane would not climb and he instead performed a forced landing into an adjacent field. The airplane sustained substantial damage to the lower fuselage and both wings during the accident sequence, precluding a determination of the failure mode of the primary landing gear extension system. While the pilot reported that the backup system did not operate because he failed to positively disconnect a circuit breaker required for the system's operation, the failure of the primary landing system was not evident until late in the accident sequence and a go-around was not feasible.
Examination of the engine revealed that the high pressure fuel injection lines had been in contact with airframe components, contrary to recommendations in the manufacturer's maintenance manual. This contact increased the stress on one of the lines, causing fatigue cracks to develop, which ultimately led to its failure and loss of fuel flow into one of the engine cylinders.
Probable cause
A partial loss of engine power during cruise flight due to incorrectly installed airframe components, which came into contact with a high pressure fuel line and resulted in its failure. Contributing to the accident was an undetermined failure of the primary landing gear extension system that could not be identified due to extensive damage.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record WPR12LA081
- Event ID
- 20120125X31012
- Case number
- WPR12LA081
- 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. 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: 94c0d5567a9cb95cd8e2902830135c719d7c3835cfa9667fda0b7af4bfa661b3; retrieved 2026-09-15T17:06:02.451Z.