WPR23LA068 · Eurocopter EC120B
Sacramento County Sheriffs Office Eurocopter EC120B · Accident: collision during takeoff/landing
From Sacramento Mather Airport (MHR) to an unrecorded destination
Event
- NTSB case
- WPR23LA068
- 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
- Event fatalities
- Unknown
- 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
Eurocopter EC120B
- Aircraft type
- Eurocopter EC120
- 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
- N255SD
- Onboard fatalities
- Unknown
- Route
- From Sacramento Mather Airport (MHR), Sacramento, CATo not recorded
- Aircraft age
- About 22 years (built 2000)
- 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
- Collision during takeoff/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
- Environmental issues › Conditions/weather/phenomena
- Personnel issues › Action/decision
- Personnel issues › Psychological
- Personnel issues › Task performance
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The flight instructor reported that the pilot receiving instruction was practicing an offsite landing in an open area. While descending on approach to the site, the airspeed decayed to 35 kts. The flight instructor prompted for an increase in airspeed, the pilot flying acknowledged, applied forward cyclic, right pedal, and continued turning left into the wind. They encountered an uncommanded left yaw and the pilot receiving instruction added right pedal until he reached full deflection. The flight instructor then assumed control of the helicopter and pushed forward on the cyclic as he lowered the collective. The instructor attempted to recover from the uncommanded left yaw; however, but the helicopter spun several times. Unable to gain forward airspeed, the flight instructor began a descent. The helicopter subsequently landed hard substantially damaging the underside of the fuselage. The flight instructor reported that there were no preaccident mechanical malfunctions or failures with the helicopter that would have precluded normal operation.
Probable cause
The pilot receiving instruction’s loss of helicopter control during landing with a crosswind, and the flight instructor’s delayed remedial action.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record WPR23LA068
- Event ID
- 20221216106469
- Case number
- WPR23LA068
- 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, cause areas. 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: 08a394aa06398a6b0578f7276d94b1b07a5221170daede001e3569b6d9bd9831; retrieved 2026-09-16T16:35:22.340Z.