DEN06LA039 · Spane RV-4
Spane RV-4 · Accident: airframe, component or system failure during initial climb
From Colonel James Jabara Airport (AAO) to Mexico Memorial Airport (MYJ)
Event
- NTSB case
- DEN06LA039
- 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
- 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
Spane RV-4
- Aircraft type
- Spane RV-4
- 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
- N437T
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Colonel James Jabara Airport (AAO), Wichita, KSTo Mexico Memorial Airport (MYJ), Mexico, MO
- 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
- Initial climb
- 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
- Airframe, component or system failure
- Also codedOther events the NTSB coded in the sequence, such as a wire strike after a loss of power. Flight Findings uses them for its kinds of event. Glossary
- Stall/mush
- 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
- Pilot in command › Aircraft control, not maintained
- Pilot in command › Preflight planning/preparation, inadequate
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
The pilot said that he did his run-up check and took the runway for takeoff. The airplane rotated, took off, and was climbing when approximately 80 feet above the ground, the canopy opened. The pilot said the canopy went to the full open position and the airplane subsequently yawed 45 degrees right. The pilot lowered the airplane's nose, applied full left rudder, and reduced the engine power to idle. The pilot said he then switched hands on the control stick and with his right hand, reached up and pulled the canopy closed. He said his airspeed was just above the stall speed and his wings were level. The airplane was approximately 20 feet above the ground when it "pancaked perfectly flat to the side of the runway." An examination of the airplane canopy latching mechanism and other airplane systems revealed no anomalies.
Probable cause
The pilot's inadequate preparation prior to takeoff, and his failure to maintain control of the airplane resulting in a stall and subsequent crash. Factors contributing to the accident were the unsecured canopy latch, the pilot's diverted attention, and the stall mush.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record DEN06LA039
- Event ID
- 20060221X00214
- Case number
- DEN06LA039
- 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, coordinates. 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: 43ed252151285dfa94ee96065340bd3758714c56f16c0a301057a7de360d19ff; retrieved 2026-09-20T17:32:05.991Z.