CHI90LA114 · Rockwell AC-690
Rockwell AC-690 · Accident: gear not extended on approach
From Austin Straubel International Airport (GRB) to Sheboygan County Memorial Airport (SBM)
Event
- NTSB case
- CHI90LA114
- 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
- 0
- 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
Rockwell AC-690
- Aircraft type
- Rockwell AC-690
- 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
- N57175
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Austin Straubel International Airport (GRB), Green Bay, WITo Sheboygan County Memorial Airport (SBM), Sheboygan, WI
- 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
- Approach · VFR pattern final
- 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
- Gear not extended
- 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 › Checklist, not followed
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
THE PILOT HAD EXECUTED A GO AROUND ON HIS FIRST APPROACH DUE TO DEER ON THE RUNWAY. ON THE NEXT APPROACH, ANOTHER AIRCRAFT CALLED ON THE BASE LEG TO AN INTERSECTING RUNWAY WHEN THE PILOT WAS TURNING TO THE BASE LEG. PILOT WAS DISTRACTED LOOKING FOR OTHER AIRCRAFT AND CONTINUED APPROACH WITH INTENTION OF HOLDING SHORT OF INTERSECTING RUNWAY. PILOT FAILED TO LOWER GEAR AND MADE GEAR UP LANDING.
Probable cause
FAILURE OF THE PILOT TO COMPLETE THE LANDING CHECKLIST AND LOWER THE LANDING GEAR. CONTRIBUTING TO THIS ACCIDENT IS HABIT PATTERN INTERFERENCE AND DISTRACTION.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CHI90LA114
- Event ID
- 20001212X22884
- Case number
- CHI90LA114
- 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: local date, investigation status. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 1990-04-18.
- API snapshot SHA-256: 987ebb55d08992b84c1aba27798b8466266d6b406a31591a75aa225d1da07a02; retrieved 2026-09-23T06:28:40.283Z.