GAA20CA075 · Cessna 182 Q
Aero-Sphere Cessna 182 Q · Accident: aerodynamic stall/spin during landing
From Centennial Airport (APA) to Vance Brand Airport (LMO)
Event
- NTSB case
- GAA20CA075
- 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
- Unknown
Cessna 182 Q
- 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
- N97596
- Operator
- Aero-Sphere
- Onboard fatalities
- Unknown
- Route
- From Centennial Airport (APA), Denver, COTo Vance Brand Airport (LMO), Longmont, CO
- Aircraft age
- About 40 years (built 1979)
- 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
- Landing
- 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
- Aerodynamic stall/spin
- 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
- Environmental issues › Physical environment
- Personnel issues › Task performance
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The pilot reported that, while operating in instrument meteorological conditions, the airplane started accumulating ice on the wings and windshield. He informed air traffic control (ATC) and requested to be diverted. ATC vectored him to a nearby airport for an instrument approach. Following completion of the instrument approach, while the airplane was about 10 ft above ground level, the airplane stalled and then landed hard on the runway. The pilot taxied the airplane to the ramp without further incident. The airplane sustained substantial damage to the fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The Federal Aviation Administration's Pilot's Handbook of Aeronautical Knowledge, FAA-H-8083-25B, provides information and guidance in a section titled, "Stalls," which stated, in part, that "as little as 0.8 millimeter of ice on the upper wing surface increases drag and reduces aircraft lift by 25 percent."
Probable cause
The pilot’s inadvertent flight into icing conditions, which resulted in the accumulation of structural icing and an aerodynamic stall.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record GAA20CA075
- Event ID
- 20191114X35333
- Case number
- GAA20CA075
- 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: 430765c8416fedd8cfd64638394c2b634ae5a6fd5a588ba7e4f2e8777b1c7c8a; retrieved 2026-09-16T10:37:34.527Z.