DFW05CA072 · Robinson R44 II
Robinson R44 II · Accident: on ground/water encounter with weather while standing
From Purcell Municipal - Steven E. Shephard field (3O3) to West Woodward Airport (WWR)
Event
- NTSB case
- DFW05CA072
- 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 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
- N7535S
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Purcell Municipal - Steven E. Shephard field (3O3), Purcell, OKTo West Woodward Airport (WWR), Woodward, OK
- 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
- Standing · idling rotors
- 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
- On ground/water encounter with weather
- 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
- Weather condition › Gusts
- Weather condition › High wind
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
After touching down on a portable helipad in a single-engine helicopter, the 10,500-hour pilot started "cool down procedures." After "sufficient time", the pilot disengaged the clutch, waited 30-45 seconds, and then turned the engine off. With the cyclic locked in the center position, the clutch light went out, and the rotor was winding down slowly. As the pilot reached back to apply the rotor brake, "a strong wind gust caused the rotor to lift and strike the tail boom. At the time of rotor blade impact, the engine was turned off and the clutch was totally disengaged." The reported wind at the time of the accident was from 350 degrees at 11 knots, gusting to 15 knots..
Probable cause
the pilot's encounter with adverse weather conditions.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record DFW05CA072
- Event ID
- 20050510X00585
- Case number
- DFW05CA072
- 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: investigation status, coordinates. 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: 14fd17cb012a5eae9daae4f5da07486aed7166ef271037d23722ecd445ee6465; retrieved 2026-09-22T06:05:11.006Z.