DFW07LA108 · Cessna A188A
Cessna A188A · Accident: airframe, component or system failure while maneuvering
From Clinton Regional Airport (CLK) to an unrecorded destination
Event
- NTSB case
- DFW07LA108
- 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
Cessna A188A
- Aircraft type
- Cessna 188
- 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
- N4413Q
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Clinton Regional Airport (CLK), Clinton, OKTo 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 137: Agricultural
- 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 · aerial application
- 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
- 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
- Exhaust system, stack › Failure
- Fluid, fuel › Vapor lock
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
As the agricultural pilot was pulling up from a low level pass, he smelled something "like wires burning" and observed the engine's fuel pressure drop. The pilot selected the auxiliary fuel pump's "EMERGENCY" position and five to ten seconds later the engine lost partial power. Not able to maintain altitude, the pilot elected to land the airplane to a rolling wheat field. During landing, the airplane nosed over and came to rest in an inverted position. An examination of the airplane revealed that, prior to impact, the engine exhaust stack had separated from the muffler. Hot exhaust gasses, that are normally vented overboard, were directed to the airplanes firewall, resulting in thermal damaged to electrical wiring and a vapor condition in the fuel gascolator. The pilot attempted to purge the vapor to no avail. No other pre impact anomalies were noted with the engine or the fuel system that would have prevented normal operating power.
Probable cause
Separation of the exhaust stack and resulting vapor lock. A contributing factor was the none suitable terrain for the forced landing.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record DFW07LA108
- Event ID
- 20070517X00579
- Case number
- DFW07LA108
- 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: 4a14b6d847c5098bef9dcb8c64b8b2e7c04446377e6b3a87cedbfb4be06076c4; retrieved 2026-09-21T08:48:56.167Z.