NYC99FA078 · Deleeuw SPRINT 1000 SPRINT 100
Deleeuw SPRINT 1000 SPRINT 100 · Accident: total loss of engine power (mechanical failure) en route
From NJ (no airport) to an unrecorded destination
Event
- NTSB case
- NYC99FA078
- 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
- 1 · all aircraft and ground
- Ground fatalities
- 0
- 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
Deleeuw SPRINT 1000 SPRINT 100
- Aircraft type
- Deleeuw SPRINT 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
- UNREG
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From NJ (no airport)To 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
- 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 · climb to cruise
- First occurrenceThe 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
- Total loss of engine power (mechanical failure)
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Destroyed
Cause areas
No findings designated as a cause are recorded in the NTSB data yet.
Approximate · Estimated position: the centre of Lakewood, NJ, the place the record names. Not the accident site.
NTSB narrative
The unregistered homebuilt airplane experienced an engine failure, then began a left turn, which evolved into a cartwheel prior to impact. The engine's normal exhaust gas temperature range was 930 degrees to 1,150 degrees Fahrenheit, while the maximum temperature was 1,200 degrees Fahrenheit. The passenger remembered seeing a digital readout, as it passed through the number 1,168. Engine teardown revealed scuffing on the magneto piston, in the vicinity of the exhaust port, on the upper half of the piston skirt. Within the scuffing, carbon deposits were observed. Scuffing and carbon fill were also found at the 4 o'clock and 7 o'clock positions, relative to the exhaust port, also on the upper half of the piston skirt. The piston rings and cylinder walls exhibited scuffing as well, which positionally corresponded to the scuffing on the cylinder skirt.
Probable cause
The pilot's loss of control, which resulted in an unintentional stall/spin after an engine failure. A factor in the accident was the engine failure, which occurred when the magneto piston seized within the cylinder sleeve during an overtemp event.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record NYC99FA078
- Event ID
- 20001205X00378
- Case number
- NYC99FA078
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
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: 9b9f26455de386bbbda59b74bff9e105e61699a2a62f5d989d294284dc7bedcb; retrieved 2026-09-20T22:12:22.513Z.