CEN12LA573 · Robinson Helicopter Company R44 II
Sun Aero Helicopters Robinson Helicopter Company R44 II · Accident: hard landing
From Waukesha County Airport (UES) to Belgium, WI
Event
- NTSB case
- CEN12LA573
- 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
Robinson Helicopter Company R44 II
- Aircraft type
- Robinson R44
- Category
- Helicopter
- 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
- N144DZ
- Operator
- Sun Aero Helicopters
- Onboard fatalities
- Unknown
- Route
- From Waukesha County Airport (UES), Waukesha, WITo Belgium, 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
- Landing · flare/touchdown
- 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
- Hard landing
- 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
- Personnel issues › Task performance
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The pilot was trying to land the helicopter in a confined area, between trees, a house, and a beach wall. The helicopter touched down on a slight hump that was concealed by grass and started to slide backwards. The pilot pulled up on the collective, and the helicopter lifted off again rapidly. The pilot tried to maneuver the helicopter to remain within and land again in the confined area. When the pilot landed again, the helicopter settled down on the front tips of the skids, which then broke at the fuselage down arm attach point. During the postaccident examination of the helicopter, the pilot noted that one of the main rotor blades sustained impact damage consistent with debris being blown up into the rotor during the landing. The pilot did not list any mechanical malfunctions associated with the helicopter during the accident flight. Nearby wind was reported to be out of 350 degrees at 12 knots, gusting to 22 knots.
Probable cause
The pilot’s failure to maintain control of the helicopter while landing in gusting wind conditions, which resulted in a hard landing.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CEN12LA573
- Event ID
- 20120827X73334
- Case number
- CEN12LA573
- 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: 619b58616d7dc250473cc53c0c96dc6415f941f3cd36390ba59b5b8f8211bc8c; retrieved 2026-09-15T19:31:34.505Z.