The Lemon IndexRobinson R44. Advanced data.
The raw numbers behind the page, in one place.
Accidents395NTSB
Fatal6416% of accidents
Deaths111NTSB
Destroyed10%of aircraft
Mechanical13%of accidents
Accidents by year
| Year | Accidents |
|---|---|
| 2008 | 18 |
| 2009 | 21 |
| 2010 | 16 |
| 2011 | 14 |
| 2012 | 23 |
| 2013 | 19 |
| 2014 | 24 |
| 2015 | 25 |
| 2016 | 15 |
| 2017 | 30 |
| 2018 | 25 |
| 2019 | 27 |
| 2020 | 19 |
| 2021 | 28 |
| 2022 | 28 |
| 2023 | 21 |
| 2024 | 22 |
| 2025 | 20 |
What happened
| What happened | Share of accidents |
|---|---|
| Loss of control in flight | 21% |
| Low altitude operation/event | 13% |
| Loss of engine power (total) | 5% |
| Loss of engine power (partial) | 4% |
| Collision during takeoff/land | 4% |
| Dynamic rollover | 4% |
Phase of flight
| Phase of flight | Share of accidents |
|---|---|
| Maneuvering | 41% |
| Landing | 15% |
| Enroute | 15% |
| Takeoff | 12% |
| Other | 5% |
Mechanical causes
| Part | Share |
|---|---|
| engine (reciprocating) | 8% |
| rotorcraft flight control | 4% |
| main rotor drive | 3% |
| engine fuel and control | 3% |
Updated