{
  "name": "Brazilian helicopter accident rates by aircraft type and operating rule, 2015-2024",
  "description": "CENIPA accident records joined to ANAC model-level flight hours to produce exposure-adjusted accident rates per 100,000 flight hours, with exact (Garwood) Poisson 95% confidence intervals. Published by Vanguard Attache; both regulators publish the inputs, neither publishes the join.",
  "creator": "Vanguard Attache",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "temporalCoverage": "2015-01-01/2024-12-31",
  "spatialCoverage": "Brazil",
  "datePublished": "2026-08-09",
  "totals": {
    "flight_hours": 2983749,
    "accidents": 170,
    "fatal_accidents": 51,
    "fatalities": 121,
    "national_rate_per_100k_hours": 5.7
  },
  "by_engine_architecture": [
    {
      "class": "Single-engine piston",
      "flight_hours": 558656,
      "accidents": 82,
      "fatal_accidents": 19,
      "fatalities": 43,
      "rate_per_100k_hours": 14.68,
      "ci95_low": 11.67,
      "ci95_high": 18.22,
      "fatal_rate_per_100k_hours": 3.4
    },
    {
      "class": "Single-engine turbine",
      "flight_hours": 1174800,
      "accidents": 71,
      "fatal_accidents": 22,
      "fatalities": 44,
      "rate_per_100k_hours": 6.04,
      "ci95_low": 4.72,
      "ci95_high": 7.62,
      "fatal_rate_per_100k_hours": 1.87
    },
    {
      "class": "Twin-engine turbine",
      "flight_hours": 1250293,
      "accidents": 17,
      "fatal_accidents": 10,
      "fatalities": 34,
      "rate_per_100k_hours": 1.36,
      "ci95_low": 0.79,
      "ci95_high": 2.18,
      "fatal_rate_per_100k_hours": 0.8
    }
  ],
  "by_model_family": [
    {
      "family": "Robinson R44",
      "flight_hours": 386528,
      "accidents": 57,
      "fatal_accidents": 16,
      "fatalities": 39,
      "rate_per_100k_hours": 14.75,
      "ci95_low": 11.17,
      "ci95_high": 19.11
    },
    {
      "family": "Robinson R22",
      "flight_hours": 143932,
      "accidents": 18,
      "fatal_accidents": 2,
      "fatalities": 3,
      "rate_per_100k_hours": 12.51,
      "ci95_low": 7.41,
      "ci95_high": 19.76
    },
    {
      "family": "Bell 206",
      "flight_hours": 130374,
      "accidents": 16,
      "fatal_accidents": 9,
      "fatalities": 20,
      "rate_per_100k_hours": 12.27,
      "ci95_low": 7.01,
      "ci95_high": 19.93
    },
    {
      "family": "Bell 407",
      "flight_hours": 49129,
      "accidents": 6,
      "fatal_accidents": 1,
      "fatalities": 5,
      "rate_per_100k_hours": 12.21,
      "ci95_low": 4.48,
      "ci95_high": 26.58
    },
    {
      "family": "Airbus AS350/H125",
      "flight_hours": 641849,
      "accidents": 34,
      "fatal_accidents": 10,
      "fatalities": 17,
      "rate_per_100k_hours": 5.3,
      "ci95_low": 3.67,
      "ci95_high": 7.4
    },
    {
      "family": "Leonardo A109",
      "flight_hours": 153475,
      "accidents": 6,
      "fatal_accidents": 4,
      "fatalities": 15,
      "rate_per_100k_hours": 3.91,
      "ci95_low": 1.43,
      "ci95_high": 8.51
    },
    {
      "family": "Robinson R66",
      "flight_hours": 184331,
      "accidents": 6,
      "fatal_accidents": 0,
      "fatalities": 0,
      "rate_per_100k_hours": 3.26,
      "ci95_low": 1.19,
      "ci95_high": 7.08
    },
    {
      "family": "Sikorsky S-76",
      "flight_hours": 251595,
      "accidents": 3,
      "fatal_accidents": 1,
      "fatalities": 1,
      "rate_per_100k_hours": 1.19,
      "ci95_low": 0.25,
      "ci95_high": 3.48
    },
    {
      "family": "Leonardo AW139",
      "flight_hours": 312055,
      "accidents": 1,
      "fatal_accidents": 0,
      "fatalities": 0,
      "rate_per_100k_hours": 0.32,
      "ci95_low": 0.01,
      "ci95_high": 1.79
    },
    {
      "family": "Sikorsky S-92",
      "flight_hours": 237137,
      "accidents": 0,
      "fatal_accidents": 0,
      "fatalities": 0,
      "rate_per_100k_hours": 0.0,
      "ci95_low": 0.0,
      "ci95_high": 1.56
    }
  ],
  "commercial_service_rbac135": [
    {
      "family": "Robinson R44",
      "flight_hours": 41831,
      "accidents": 11,
      "fatal_accidents": 3,
      "rate_per_100k_hours": 26.3,
      "ci95_low": 13.13,
      "ci95_high": 47.05
    },
    {
      "family": "Bell 206",
      "flight_hours": 54104,
      "accidents": 4,
      "fatal_accidents": 2,
      "rate_per_100k_hours": 7.39,
      "ci95_low": 2.01,
      "ci95_high": 18.93
    },
    {
      "family": "Airbus AS350/H125",
      "flight_hours": 102357,
      "accidents": 2,
      "fatal_accidents": 0,
      "rate_per_100k_hours": 1.95,
      "ci95_low": 0.24,
      "ci95_high": 7.06
    },
    {
      "family": "Sikorsky S-76",
      "flight_hours": 247198,
      "accidents": 3,
      "fatal_accidents": 1,
      "rate_per_100k_hours": 1.21,
      "ci95_low": 0.25,
      "ci95_high": 3.55
    },
    {
      "family": "Leonardo AW139",
      "flight_hours": 305720,
      "accidents": 1,
      "fatal_accidents": 0,
      "rate_per_100k_hours": 0.33,
      "ci95_low": 0.01,
      "ci95_high": 1.82
    },
    {
      "family": "Sikorsky S-92",
      "flight_hours": 231543,
      "accidents": 0,
      "fatal_accidents": 0,
      "rate_per_100k_hours": 0.0,
      "ci95_low": 0.0,
      "ci95_high": 1.59
    }
  ],
  "rotary_wing_movements_cgna": [
    {
      "aerodrome": "SBJR",
      "name": "Jacarepagua, Rio de Janeiro",
      "2023": 63203,
      "2024": 64366,
      "2025": 87815
    },
    {
      "aerodrome": "SBMT",
      "name": "Campo de Marte, Sao Paulo",
      "2023": 22692,
      "2024": 21011,
      "2025": 25481
    },
    {
      "aerodrome": "SBRJ",
      "name": "Santos Dumont, Rio de Janeiro",
      "2023": 3293,
      "2024": 2849,
      "2025": 3233
    }
  ],
  "city_accident_counts": [
    {
      "city": "Rio de Janeiro",
      "accidents_2015_2024": 13,
      "fatal_accidents_2015_2024": 4,
      "fatalities_2015_2024": 7,
      "accidents_2023_2025": 1
    },
    {
      "city": "Sao Paulo",
      "accidents_2015_2024": 9,
      "fatal_accidents_2015_2024": 2,
      "fatalities_2015_2024": 6,
      "accidents_2023_2025": 2
    }
  ],
  "sources": [
    {
      "id": "N1",
      "publisher": "CENIPA / COMAER",
      "dataset": "Ocorrencias Aeronauticas da Aviacao Civil Brasileira (Sistema DEDALO)",
      "url": "https://dedalo.sti.fab.mil.br/dadosabertos/",
      "file_update": "2026-05-18"
    },
    {
      "id": "D1",
      "publisher": "ANAC",
      "dataset": "Horas Voadas de Aeronave",
      "url": "https://www.anac.gov.br/acesso-a-informacao/dados-abertos/areas-de-atuacao/voos-e-operacoes-aereas/horas-voadas-por-aeronave/metadados-do-conjunto-de-dados-horas-voadas-de-aeronave",
      "file_date": "2025-02-03",
      "data_coverage": "2010-01 to 2025-01"
    },
    {
      "id": "D2",
      "publisher": "ANAC",
      "dataset": "Registro Aeronautico Brasileiro",
      "url": "https://www.anac.gov.br/acesso-a-informacao/dados-abertos/areas-de-atuacao/aeronaves/registro-aeronautico-brasileiro",
      "retrieved": "2026-08-09"
    },
    {
      "id": "M1",
      "publisher": "CGNA / DECEA",
      "dataset": "Anuario Estatistico de Trafego Aereo 2025",
      "url": "https://portal.cgna.decea.mil.br/files/uploads/anuario_estatistico/anuario_estatistico_2025.pdf"
    },
    {
      "id": "H1",
      "publisher": "ANAC",
      "dataset": "Seguranca Operacional para Helicopteros (2011 data)",
      "url": "https://www2.anac.gov.br/SGSO2/Semin%C3%A1rios/Seguran%C3%A7a%20Operacional%20para%20Helic%C3%B3pteros.pdf"
    },
    {
      "id": "R1",
      "publisher": "FAA / Federal Register",
      "dataset": "SFAR 73 final rule",
      "url": "https://www.federalregister.gov/documents/2024/07/23/2024-15924/robinson-helicopter-r-22-and-r-44-special-training-and-experience-requirements",
      "published": "2024-07-23"
    }
  ],
  "method": {
    "numerator": "CENIPA ACIDENTE records only; serious incidents and ordinary incidents excluded, never pooled.",
    "denominator": "ANAC horas_voadas rows with cd_cls starting H, summed by model family over 2015-2024.",
    "confidence_intervals": "Exact (Garwood) Poisson intervals on the accident count.",
    "exposure_floor": "Families under 20,000 hours in the window are reported but not ranked.",
    "sensitivity": "Excluding ANAC's estimated/interpolated hours (10.8% of exposure) raises every rate; R44 moves 14.75 to 17.28. Headline figures use the full denominator, the conservative choice."
  },
  "url": "https://vanguardattache.com/datasets/helicopter-safety-brazil-rio-flight-hour-analysis.json",
  "mainEntityOfPage": "https://vanguardattache.com/en/insights/helicopter-safety-brazil-rio-flight-hour-analysis",
  "suggestedCitation": "Vanguard Attaché, \"Brazilian helicopter accident rates by aircraft type and operating rule, 2015–2024.\" Accident counts from CENIPA/COMAER (Sistema DEDALO); flight-hour exposure from ANAC (Horas Voadas de Aeronave). Rates and 95% Garwood–Poisson intervals computed by Vanguard Attaché. https://vanguardattache.com/en/insights/helicopter-safety-brazil-rio-flight-hour-analysis",
  "measurementTechnique": "Accident counts (CENIPA ACIDENTE records only — serious incidents and ordinary incidents excluded, never pooled) divided by ANAC flight-hour exposure (horas_voadas rows with cd_cls beginning H), summed by model family across 2015–2024, expressed per 100,000 flight hours. Exact (Garwood) Poisson 95% intervals on the accident count. Model families under 20,000 hours of exposure in the window are reported but not ranked.",
  "variableMeasured": [
    {
      "@type": "PropertyValue",
      "name": "rate_per_100k_hours",
      "description": "Total accidents per 100,000 flight hours for the aircraft class or model family.",
      "unitText": "accidents per 100,000 flight hours"
    },
    {
      "@type": "PropertyValue",
      "name": "fatal_rate_per_100k_hours",
      "description": "Fatal accidents per 100,000 flight hours.",
      "unitText": "fatal accidents per 100,000 flight hours"
    },
    {
      "@type": "PropertyValue",
      "name": "ci95_low / ci95_high",
      "description": "Exact (Garwood) Poisson 95% confidence bounds on the accident rate.",
      "unitText": "accidents per 100,000 flight hours"
    },
    {
      "@type": "PropertyValue",
      "name": "flight_hours",
      "description": "ANAC-reported rotary-wing flight-hour exposure over 2015–2024.",
      "unitText": "hours"
    },
    {
      "@type": "PropertyValue",
      "name": "accidents / fatal_accidents / fatalities",
      "description": "CENIPA ACIDENTE counts over the same window.",
      "unitText": "count"
    }
  ]
}