GAA16CA052 · Cessna 172S
Civil Air Patrol Cessna 172S · Accident: airport occurrence while taxiing
From McGhee Tyson Airport (TYS) to McGhee Tyson Airport (TYS)
Event
- NTSB case
- GAA16CA052
- 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 172S
- Aircraft type
- Cessna 172
- 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
- N905CP
- Operator
- Civil Air Patrol
- Onboard fatalities
- Unknown
- Route
- From McGhee Tyson Airport (TYS), Alcoa, TNTo McGhee Tyson Airport (TYS), Alcoa, TN
- Aircraft age
- About 16 years (built 1999)
- 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 · from runway
- 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
- Airport occurrence
- 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 › Conditions/weather/phenomena
- Personnel issues › Action/decision
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
During a night flight, the pilot reported that after he landed on the runway, he slowed the airplane to taxi speed, and continued to the taxiway turnoff. The pilot misidentified the taxiway turn and turned off the runway into a grass area between the runway and taxiway. The pilot reported that the grass area had a downslope that led to level ground and he felt a bump from the tail as the airplane transitioned from the downslope to level ground. The airplane sustained substantial damage to the rudder.
The pilot reported no preimpact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.
Probable cause
The pilot's failure to identify the taxiway, which resulted in a runway excursion and impact with terrain while turning off the runway at night.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record GAA16CA052
- Event ID
- 20151119X94022
- Case number
- GAA16CA052
- 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: local date, investigation status. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 2015-11-05.
- API snapshot SHA-256: 2ccba8a98429f2e060d3b267c48564e390dd1fde3ac38d6f5f7689317bf6a039; retrieved 2026-09-16T02:58:52.156Z.