CEN17WA237 · Amateur Construction KOLB FIREFLY UNDESIGNAT
Amateur Construction KOLB FIREFLY UNDESIGNAT · Accident: loss of control in flight while maneuvering
Narrative check · The NTSB narrative appears to contradict this record's damage. Values are shown as recorded, not corrected; compare with the narrative.
Event
- NTSB case
- CEN17WA237
- 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
- Unknown · led by another country; figures from NTSB notifications
- API-reported fatalities
- 1 · 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
- Unknown
- 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
Amateur Construction KOLB FIREFLY UNDESIGNAT
- Aircraft type
- Amateur Construction KOLB FIREFLY
- 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
- G-CEPN
- 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
- Not recorded
- 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
- Maneuvering
- 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 control in flight
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Not recorded Narrative disagrees
Cause areas
No findings designated as a cause are recorded in the NTSB data yet.
Not plotted · Location withheld: coordinates are missing, conflicting, invalid, or have no accepted acquisition method. No substitute location has been invented.
NTSB 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
Verbatim NTSB factual narrative from the NTSB dataset
Sources
NTSB record CEN17WA237
- Event ID
- 20170620X02122
- Case number
- CEN17WA237
- 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.
- No bulk values were replaced by the NTSB case API.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: 2bdfcae85aad8f0b3e28baf40d22836114113b8da4e4393d4ab501cc88c706a0; retrieved 2026-09-15T06:04:39.519Z.