# NTSB CEN17WA237: Amateur Construction Kolb Firefly, Luffenhall, United Kingdom, June 20, 2017

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Foreign investigation
- Date: June 20, 2017, 09:20 local (09:20 UTC)
- Place: Luffenhall, United Kingdom
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Defining event: [Maneuvering: Loss of control in flight](https://openairdocs.org/ntsb-events/240)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Led by another country's authority
- NTSB office: Central Region
- Lead agency: Other
- NTSB case key (mKey): 95402
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN17WA237
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/95402/pdf
- Page: https://openairdocs.org/ntsb/CEN17WA237

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Maneuvering: Loss of control in flight](https://openairdocs.org/ntsb-events/240) (defining event); cases with it: [All aircraft, 5,002 cases](https://openairdocs.org/ntsb-events/240/sequence.md)

## Factual narrative

On June 20, 2017, about 0920 Coordinated Universal Time (UTC), a Kolb Firefly ultralite, British registration G-CEPN, impacted terrain under unknown circumstances near Newell Lane, Luffenhall, Hertfordshire, England. The pilot, the sole occupant on board, was fatally injured. The aircraft was destroyed. The Air Accidents Investigation Branch (AAIB) is investigating the accident. As the state of manufacture of the airplane and engine, the NTSB has designated a U.S. accredited representative to assist the AAIB in its investigation. All inquiries concerning this accident should be directed to the AAIB in England: The Air Accidents Investigation Branch (AAIB) Farnborough House Berkshire Copse Road Aldershot, Hampshire GU11 2HH, United Kingdom Website:http://www.aaib.gov.uk

## Aircraft

- Registration: G-CEPN (not matched to a registry record)
- Reported make and model: AMATEUR CONSTRUCTION KOLB FIREFLY (UNDESIGNAT)
- Category: Ultralight
- Serial number: FF05.4.00048
- Fire: Unknown
- Airworthiness certificate: Unknown

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot

## Weather

- Conditions: Visual (VMC)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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