{
  "contract": {
    "agency_name": "Department of Defence",
    "amendment_count": 2,
    "category_code": "25131700",
    "contract_end_date": "2027-06-30",
    "contract_id": "CN4007989",
    "contract_start_date": "2023-09-01",
    "currency": "AUD",
    "current_reported_value": "219032585.37",
    "description": "Aircraft Maintenance Services",
    "events": [
      {
        "absolute_change": "-9896815.87",
        "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
        "after_release_id": "prod-d8e2d144ae2c471ab0fa642450f54b00-fd9fbca6fcd73b2ea75ebc9a7b1968bd",
        "after_source_hash": "505e3c544b5c336efa99d58ee3d93b80a8bc2f3247cebd43d56dbd347dca436a",
        "before_release_id": "prod-d8e2d144ae2c471ab0fa642450f54b00-dbf76bb41c7c30cab2782f183b511fac",
        "before_source_hash": "22085453bb279b328aa4681b2397f8d1558cd9794d2da9aebc94be70e411653c",
        "contract_id": "CN4007989",
        "detected_at": "2026-07-22T02:03:52Z",
        "direction": "decrease",
        "duration_change_days": null,
        "event_id": "2792e7e5a17a6724d48d6a4fe933dbacbec213533b7aa719b69abc1f4d10a0f6",
        "field_label": "Reported Value",
        "field_name": "reported_value",
        "new_value": "226094876.13",
        "notice_id": "CN4007989-A1",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/18384f17-fad3-4783-a119-d62dcc32abe1",
        "old_value": "235991692.00",
        "percentage_change": "-4.19",
        "source_license": "https://creativecommons.org/licenses/by/3.0/au/",
        "source_publisher": "Australian Government Department of Finance",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4007989",
        "summary": "Reported contract value decreased by $9,896,815.87 (-4.19%)."
      },
      {
        "absolute_change": "-7062290.76",
        "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
        "after_release_id": "prod-d8e2d144ae2c471ab0fa642450f54b00-57963caa800c36ca85aada5c49206ad1",
        "after_source_hash": "39da2a6db35748d992f44a5687754ce0c48928b768c4dd3c6a5cd3aa71c3a723",
        "before_release_id": "prod-d8e2d144ae2c471ab0fa642450f54b00-fd9fbca6fcd73b2ea75ebc9a7b1968bd",
        "before_source_hash": "505e3c544b5c336efa99d58ee3d93b80a8bc2f3247cebd43d56dbd347dca436a",
        "contract_id": "CN4007989",
        "detected_at": "2026-07-22T02:03:52Z",
        "direction": "decrease",
        "duration_change_days": null,
        "event_id": "71caa2babd543c1e477ffd7bf0353acdb92ba456d7fb175757476d364d774b24",
        "field_label": "Reported Value",
        "field_name": "reported_value",
        "new_value": "219032585.37",
        "notice_id": "CN4007989-A2",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/de66260c-231c-4715-a304-384bcdcb73f4",
        "old_value": "226094876.13",
        "percentage_change": "-3.12",
        "source_license": "https://creativecommons.org/licenses/by/3.0/au/",
        "source_publisher": "Australian Government Department of Finance",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4007989",
        "summary": "Reported contract value decreased by $7,062,290.76 (-3.12%)."
      }
    ],
    "evidence_path": "evidence/CN4007989.json",
    "latest_modified_at": "2026-07-22T02:03:52Z",
    "notice_id": "CN4007989-A2",
    "official_record_url": "https://www.tenders.gov.au/Cn/Show/de66260c-231c-4715-a304-384bcdcb73f4",
    "original_reported_value": "235991692.00",
    "procurement_method": "Limited tender",
    "source_url": "https://api.tenders.gov.au/ocds/findById/CN4007989",
    "supplier_name": "NORTHROP GRUMMAN AUSTRALIA PTY LIMITED",
    "title": "4600060361",
    "value_change": "-16959106.63",
    "value_change_percentage": "-7.19",
    "versions": [
      {
        "agency_name": "Department of Defence",
        "category_code": "25131700",
        "contract_end_date": "2027-06-30",
        "contract_id": "CN4007989",
        "contract_start_date": "2023-09-01",
        "currency": "AUD",
        "description": "Aircraft Maintenance Services",
        "notice_id": "CN4007989",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/e7f4cdde-6721-432a-a991-df279abde759",
        "procurement_method": "Limited tender",
        "reported_value": "235991692.00",
        "source_hash": "22085453bb279b328aa4681b2397f8d1558cd9794d2da9aebc94be70e411653c",
        "source_modified_at": "2023-10-05T03:17:27Z",
        "source_release_id": "prod-d8e2d144ae2c471ab0fa642450f54b00-dbf76bb41c7c30cab2782f183b511fac",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4007989",
        "supplier_name": "NORTHROP GRUMMAN AUSTRALIA PTY LIMITED",
        "title": "4600060361"
      },
      {
        "agency_name": "Department of Defence",
        "category_code": "25131700",
        "contract_end_date": "2027-06-30",
        "contract_id": "CN4007989",
        "contract_start_date": "2023-09-01",
        "currency": "AUD",
        "description": "Aircraft Maintenance Services",
        "notice_id": "CN4007989-A1",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/18384f17-fad3-4783-a119-d62dcc32abe1",
        "procurement_method": "Limited tender",
        "reported_value": "226094876.13",
        "source_hash": "505e3c544b5c336efa99d58ee3d93b80a8bc2f3247cebd43d56dbd347dca436a",
        "source_modified_at": "2026-07-22T02:03:52Z",
        "source_release_id": "prod-d8e2d144ae2c471ab0fa642450f54b00-fd9fbca6fcd73b2ea75ebc9a7b1968bd",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4007989",
        "supplier_name": "NORTHROP GRUMMAN AUSTRALIA PTY LIMITED",
        "title": "4600060361"
      },
      {
        "agency_name": "Department of Defence",
        "category_code": "25131700",
        "contract_end_date": "2027-06-30",
        "contract_id": "CN4007989",
        "contract_start_date": "2023-09-01",
        "currency": "AUD",
        "description": "Aircraft Maintenance Services",
        "notice_id": "CN4007989-A2",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/de66260c-231c-4715-a304-384bcdcb73f4",
        "procurement_method": "Limited tender",
        "reported_value": "219032585.37",
        "source_hash": "39da2a6db35748d992f44a5687754ce0c48928b768c4dd3c6a5cd3aa71c3a723",
        "source_modified_at": "2026-07-22T02:03:52Z",
        "source_release_id": "prod-d8e2d144ae2c471ab0fa642450f54b00-57963caa800c36ca85aada5c49206ad1",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4007989",
        "supplier_name": "NORTHROP GRUMMAN AUSTRALIA PTY LIMITED",
        "title": "4600060361"
      }
    ]
  },
  "disclaimer": "ContractDelta identifies changes in publicly reported procurement records. A change is not evidence of misconduct. Contract amendments can result from legitimate changes in scope, timing, pricing, reporting, or data correction.",
  "generated_at": "2026-07-31T04:07:58Z",
  "schema_version": "1.0",
  "source": {
    "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
    "coverage": {
      "amended_contracts_discovered": 950,
      "amended_contracts_selected": 20,
      "amended_contracts_skipped": 930,
      "max_amended_contracts": 20,
      "mode": "bounded_amendments",
      "query_end": "2026-08-03T23:59:59.999999Z",
      "query_start": "2026-07-26T00:00:00Z",
      "selection_method": "Explicit amendment contracts were ranked by current reported value, then source modification time and contract ID. Only the highest-ranked bounded set was processed."
    },
    "license": "https://creativecommons.org/licenses/by/3.0/au/",
    "name": "AusTender OCDS API",
    "publisher": "Australian Government Department of Finance"
  }
}