ERA15LA365 · Clark 1000
Clark 1000 · Accident: aerodynamic stall/spin during takeoff
From Skylark Airpark (7B6) to Skylark Airpark (7B6)
Narrative check · The NTSB narrative appears to contradict this record's location. Values are shown as recorded, not corrected; compare with the narrative.
Event
- NTSB case
- ERA15LA365
- 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
Clark 1000
- Aircraft type
- Clark 1000
- 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
- N9018R
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Skylark Airpark (7B6), Warehouse Point, CTTo Skylark Airpark (7B6), Warehouse Point, CT
- Aircraft age
- About 56 years (built 1959)
- 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
- 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
- Aerodynamic stall/spin
- 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 › Task performance
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The private pilot was taking off in the single-seat, single-engine biplane. A witness described that, during the takeoff roll on the mowed grass beside the paved runway, the airplane veered left into taller grass, but the pilot continued the takeoff toward tall trees. After becoming airborne, the airplane's pitch attitude was "much too severe," and it appeared to "run out of energy" as the wings rocked back and forth. The airplane settled onto the ground in tall weeds off the departure end of the runway, nosed over, and came to rest inverted. A video of the flight depicted a flight profile consistent with that described by the witness. Smooth, continuous engine sounds were heard well into the airplane's descent.
The pilot's decision to depart from the grass runway rather than the paved runway increased the overall takeoff distance required, a distance which increased even more when the airplane traveled into taller vegetation during the takeoff roll. Rather than aborting the takeoff, the pilot chose to continue, and the airplane became airborne at a point from which it could not maintain a climb over the trees at the end of the runway. The pilot responded by increasing the airplane's pitch attitude, resulting in an exceedance of its critical angle of attack and an aerodynamic stall.
Probable cause
The pilot’s failure to maintain adequate airspeed during the initial climb after takeoff, which resulted in the airplane exceeding its critical angle of attack and experiencing an aerodynamic stall. Contributing to the accident was the pilot's decision to conduct the takeoff from a grass runway rather than a paved surface, and his decision to continue the takeoff after the airplane traveled into taller vegetation, which significantly increased the distance required to clear trees at the end of the runway.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record ERA15LA365
- Event ID
- 20150921X53106
- Case number
- ERA15LA365
- 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: bb9d6b5cb053dffeef60c792de3ba55cd0200aa894a27ed48cf3720f5d2a9c30; retrieved 2026-09-16T02:47:41.514Z.