GAA15CA173 · Cessna 182 T
Crystal Air Cessna 182 T · Accident while taxiing
From McMinn County Airport (MMI) to McMinn County Airport (MMI)
Event
- NTSB case
- GAA15CA173
- 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 182 T
- Aircraft type
- Cessna 182
- 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
- N234CF
- Operator
- Crystal Air
- Onboard fatalities
- Unknown
- Route
- From McMinn County Airport (MMI), Athens, TNTo McMinn County Airport (MMI), Athens, TN
- Aircraft age
- About 13 years (built 2002)
- 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
- Taxi
- 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
- Miscellaneous/other
- 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
- Environmental issues › Operating environment
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The pilot reported that while taxiing to the active runway, about 50 yards ahead, he saw what appeared to be a black oval, 4-5 feet in diameter on the taxiway. He stated that he believed it was a wet spot or an area of new pavement, and started to steer around it. As the pilot approached the spot, he reported that he glanced off to the left and saw sink holes in the field, then he looked back towards the taxiway and suddenly the airplane sank into the taxiway. The airplane came to a stop after the right wheel fell into the sink hole and the fuselage impacted the taxiway surface. The hole had opened up to about 9-10 feet across and 7-8 feet deep. The fuselage was substantially damaged in the accident.
During a postaccident interview, the airport manager stated that she was unaware of sink holes on any safety areas at the airport, including this taxiway. After the accident, the airport immediately issued a notice to airmen closing the taxiway. The pilot stated there were no mechanical malfunctions or failures with the airplane that would have precluded normal operation.
Probable cause
The failure of the taxiway surface due to a sink hole, which resulted in the right main landing gear sinking into terrain causing substantial damage to the fuselage.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record GAA15CA173
- Event ID
- 20150709X73022
- Case number
- GAA15CA173
- 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.
- 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: e3a87ff62f763ebe85aecb82531d3ce0ae97f921a44bf1c547602b5c5e5c2652; retrieved 2026-09-16T02:30:58.299Z.