# NTSB CEN15WA358: Robinson Helicopter Robinson R44, Leixlip, Ireland, July 25, 2015

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Foreign investigation
- Date: July 25, 2015, 09:55 local (09:55 UTC)
- Place: Leixlip, Ireland
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Defining events: [Enroute: Near midair/TCAS alert/loss of separation](https://openairdocs.org/ntsb-events/260); [Enroute: Near midair/TCAS alert/loss of separation](https://openairdocs.org/ntsb-events/260)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Led by another country's authority
- NTSB office: Central Region
- Lead agency: Other
- NTSB case key (mKey): 91772
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN15WA358
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/91772/pdf
- Page: https://openairdocs.org/ntsb/CEN15WA358

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Enroute: Near midair/TCAS alert/loss of separation](https://openairdocs.org/ntsb-events/260) (defining event), aircraft 1; cases with it: [All aircraft, 96 cases](https://openairdocs.org/ntsb-events/260/sequence.md)
- [Enroute: Near midair/TCAS alert/loss of separation](https://openairdocs.org/ntsb-events/260) (defining event), aircraft 2; cases with it: [All aircraft, 96 cases](https://openairdocs.org/ntsb-events/260/sequence.md)

## Aircraft 1

- Registration: G-OCON (not matched to a registry record)
- Reported make and model: ROBINSON HELICOPTER CO INC ROBINSON R44 (UNDESIGNAT)
- Category: Helicopter
- Serial number: 1608
- Engines: LYCOMING O-540-F1B5 235 horsepower reciprocating
- Damage: No damage

## Aircraft 2

- Registration: EI-OFM (not matched to a registry record)
- Reported make and model: REIMS AVIATION SA CESSNA F172N
- Category: Airplane
- Serial number: 1988
- Engines: O-320-H2AD 160 horsepower reciprocating
- Damage: No damage
- Registered owner: Phillips, Carol

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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