{
 "publisher": "DroneLedger",
 "site": "https://droneincidents.com",
 "generated": "2026-10-16T02:47:58+00:00",
 "release": "20261016T024758780570-1b2590",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/",
  "attribution": "DroneLedger (droneincidents.com)",
  "excludes": "Quoted source passages and linked articles remain the copyright of their publishers; they are included as short quotations for verification. Linked media and satellite images remain the rights holders' property; no image or video licence is granted by this dataset. Fonts (SIL OFL) and map data (Natural Earth, public domain) keep their own terms. City and region names in automatically published dossiers are checked against GeoNames (geonames.org, CC BY 4.0). Drone drawings and animations are schematic illustrations of a type, not evidence about any incident."
 },
 "assessmentNote": "DroneLedger assessment, not a finding. Editorial likelihood bands, not calibrated statistical confidence intervals. Unknown has no numeric probability. Outcomes are attributed reports; no totals or inference of intent from a hit.",
 "assessmentScale": {
  "version": "di-estimative-v1",
  "levels": {
   "almost_certain": {
    "low": 95,
    "high": 99
   },
   "very_likely": {
    "low": 80,
    "high": 95
   },
   "likely": {
    "low": 55,
    "high": 80
   },
   "roughly_even_chance": {
    "low": 45,
    "high": 55
   },
   "unlikely": {
    "low": 20,
    "high": 45
   },
   "very_unlikely": {
    "low": 5,
    "high": 20
   },
   "almost_no_chance": {
    "low": 1,
    "high": 5
   },
   "unknown": {
    "low": null,
    "high": null
   }
  }
 },
 "evidenceNote": "Each dossier separates three claims: drone presence, impact and attribution, each with its own evidence state and supporting sources. 'reported' means a source describes the claim without sufficient identification evidence; claims by parties to a conflict are never 'confirmed' on their own. Counts reflect dossiers in this curated archive, not all incidents worldwide. windowStart/windowEnd are reporting-window calendar bounds, not individual event days; legacy date remains the compatibility/sorting date for such records.",
 "locationNote": "lat/lon are the dossier's own approximate coordinates (see locationPrecision) and are empty when the incident location is unknown. referencePoint {lat, lon, level, name} is a display reference only: a fixed point in the named city (GeoNames), region (its administrative seat), sea or country (Natural Earth label point), derived at build time. It is not a geolocation, not an estimate of the incident location and may change when the dossier's place becomes more precise: reference point; incident location unknown.",
 "detailsNote": "media, operationalEffects, followUp and archiveEntity are editorial, source-indexed additions. Media is publisher-link only, has its own evidence status and never establishes drone presence or attribution. Debunked original-media links are removed; archived revisions omit media references. archivePattern is computed from mapped published event records at generated time, not a worldwide incident count. Null asOf means not established; publication time is not substituted.",
 "dataset": {
  "doi": "10.5281/zenodo.23345422",
  "url": "https://doi.org/10.5281/zenodo.23345422",
  "note": "Citable weekly snapshot (CSV + JSON) archived on Zenodo; this DOI always resolves to the latest version."
 },
 "howToCite": "Cite the dossier URL and revision, e.g. DroneLedger, “Wine Trader hit off Romania; president says drones struck the ship”, dossier wine-trader-fire-off-romania-2026-10-15, revision 4, updated 2026-10-15. https://droneincidents.com/incident/wine-trader-fire-off-romania-2026-10-15/",
 "incident": {
  "id": "new-york-drone-helicopter-collision-2017-09-21",
  "title": "Drone and Army helicopter collide near New York City in September 2017",
  "place": "New York City",
  "country": "United States",
  "countryCode": "US",
  "date": "2017-09-21",
  "dateKind": "event",
  "scope": "single",
  "category": "public-safety",
  "droneStatus": "confirmed",
  "impactStatus": "confirmed",
  "attributionStatus": "none",
  "lat": 40.71,
  "lon": -74.01,
  "locationPrecision": "region",
  "summary": "A privately operated drone collided with a US Army helicopter near New York City on21September2017. Investigators recovered drone parts from the helicopter. DJI later described using sales records to trace a recovered fragment during the NTSB investigation.",
  "impact": "The NTSB statement describes damage to the helicopter. DJI reports no injuries. No airport shutdown, casualties or wider disruption is established by these sources.",
  "evidence": "The NTSB statement reports physical parts recovery and operator interviews. DJI separately describes its own fragment-tracing contribution. These are distinct original evidence contributions within the same investigation, not two unrelated investigations. The current NTSB completed-case page was also read and is consistent with a collision finding; its publication date is not displayed, so none is fabricated in the public source list.",
  "unknown": "The October statement was preliminary; the May2020 manufacturer account describes the later investigation. The manufacturer’s privacy-policy assertions are not independently assessed here. No precise airborne position, altitude, flight route, private operator name or device serial included.",
  "attribution": "The investigation identified a private drone operator. No government or organisational direction, criminal conviction or state attribution is asserted here.",
  "sources": [
   {
    "label": "NTSB5October2017 statement via sUASNews",
    "url": "https://www.suasnews.com/2017/10/ntsb-investigating-collision-drone-u-s-army-helicopter/",
    "published": "2017-10-05",
    "family": "us-ntsb"
   },
   {
    "label": "DJI Viewpoints: original manufacturer investigation account",
    "url": "https://viewpoints.dji.com/blog/how-i-know-dji-doesnt-have-your-drone-data",
    "published": "2020-05-16",
    "family": "dji"
   }
  ],
  "timeline": [
   {
    "date": "2017-09-21",
    "text": "A privately operated drone collided with a US Army helicopter near New York City on21September2017. Investigators recovered drone parts from the helicopter. DJI later described using sales records to trace a recovered fragment during the NTSB investigation.",
    "source": 0
   },
   {
    "date": "2020-05-16",
    "text": "DJI publishes an original account of its contribution to identifying the recovered component in the NewYork2017 investigation. Follow-up publication, not a second event.",
    "source": 1
   }
  ],
  "droneStatusSources": [
   0,
   1
  ],
  "impactStatusSources": [
   0,
   1
  ],
  "attributionSources": [],
  "droneTypes": [],
  "claims": [
   {
    "id": "physical-parts",
    "axis": "drone",
    "statement": "The NTSB reported recovery of drone components from the helicopter.",
    "quote": "A motor and arm from a small drone",
    "claimant": "National Transportation Safety Board",
    "originId": "ntsb-statement-20171005",
    "relay": "relayed",
    "assessment": "supports",
    "note": "Short literal passage read on the public source page; reported drone presence is not technical identification.",
    "sourceIndex": 0,
    "quoteCheckedAt": "2026-10-16",
    "quoteTranslation": {}
   },
   {
    "id": "aircraft-damage",
    "axis": "impact",
    "statement": "The Army helicopter sustained damage.",
    "quote": "The Army helicopter sustained damage",
    "claimant": "National Transportation Safety Board",
    "originId": "ntsb-statement-20171005",
    "relay": "relayed",
    "assessment": "supports",
    "note": "Short literal passage read on the public source page; reported drone presence is not technical identification.",
    "sourceIndex": 0,
    "quoteCheckedAt": "2026-10-16",
    "quoteTranslation": {}
   },
   {
    "id": "manufacturer-trace",
    "axis": "drone",
    "statement": "DJI says it helped identify the purchaser from a recovered component using its records.",
    "quote": "use the serial number to identify",
    "claimant": "DJI",
    "originId": "dji-investigation-account-20200516",
    "relay": "relayed",
    "assessment": "supports",
    "note": "Short literal passage read on the public source page; reported drone presence is not technical identification.",
    "sourceIndex": 1,
    "quoteCheckedAt": "2026-10-16",
    "quoteTranslation": {}
   },
   {
    "id": "no-injury",
    "axis": "impact",
    "statement": "DJI reports no injury.",
    "quote": "No one was injured",
    "claimant": "DJI",
    "originId": "dji-investigation-account-20200516",
    "relay": "relayed",
    "assessment": "context",
    "note": "Short literal passage read on the public source page; reported drone presence is not technical identification.",
    "sourceIndex": 1,
    "quoteCheckedAt": "2026-10-16",
    "quoteTranslation": {}
   }
  ],
  "review": "editor",
  "checkedAt": "2026-10-15",
  "autoCheckedAt": null,
  "updatedAt": "2026-10-16",
  "revision": 1,
  "series": [],
  "windowStart": null,
  "windowEnd": null,
  "windowBasis": null,
  "assessment": null,
  "outcome": [],
  "assessment_scale_version": null,
  "assessment_operator_subject": null,
  "assessment_operator_level": null,
  "assessment_operator_range_low": null,
  "assessment_operator_range_high": null,
  "assessment_target_subject": null,
  "assessment_target_level": null,
  "assessment_target_range_low": null,
  "assessment_target_range_high": null,
  "assessment_droneType_subject": null,
  "assessment_droneType_level": null,
  "assessment_droneType_range_low": null,
  "assessment_droneType_range_high": null,
  "media": [],
  "operationalEffects": [],
  "followUp": [],
  "archiveEntity": null,
  "namedLocation": null,
  "publisherMedia": [],
  "archivePattern": null,
  "impactReports": [],
  "corroboration": "curated",
  "interceptionReported": {
   "evidenceState": "reported",
   "note": "Official aggregate claims, not independently verified kills. Parts are included only when explicitly sourced and sum to the reported total. Catalogue countermeasures are not incident evidence.",
   "counts": []
  },
  "referencePoint": null,
  "labels": {
   "category": "Public safety",
   "droneStatus": "Confirmed",
   "impactStatus": "Confirmed",
   "attributionStatus": "Not established"
  },
  "url": "https://droneincidents.com/incident/new-york-drone-helicopter-collision-2017-09-21/",
  "citation": "DroneLedger, “Drone and Army helicopter collide near New York City in September 2017”, dossier new-york-drone-helicopter-collision-2017-09-21, revision 1, updated 2026-10-16. https://droneincidents.com/incident/new-york-drone-helicopter-collision-2017-09-21/",
  "history": [
   {
    "revision": 1,
    "date": "2026-10-16",
    "at": "2026-10-16T01:41:13.340+00:00",
    "note": "Curated dossier created after checking the cited sources line by line."
   }
  ]
 }
}