{
  "generated_on": "2026-07-31",
  "checked_at": "2026-07-31T19:18:42Z",
  "title": "History collector maturity",
  "jobs": 8,
  "eligible_jobs": 0,
  "history_building_jobs": 6,
  "history_and_method_gate_jobs": 1,
  "external_source_blocked_jobs": 1,
  "registration_collector": {
    "name": "Monthly FAA registration history",
    "cadence": "Monthly · first day at 05:30 UTC",
    "earliest_snapshot": "2026-07-01",
    "latest_snapshot": "2026-07-01",
    "distinct_snapshots": 1,
    "observed_days": 1,
    "observed_months": 1,
    "current_rows": 308578,
    "baseline_events": 308578,
    "change_events": 0,
    "event_detail": "0 owner, state, model or register-exit changes"
  },
  "listing_collector": {
    "name": "Daily listing-state history",
    "cadence": "Daily · 05:15 UTC; monthly registry validation",
    "earliest_snapshot": "2026-07-30",
    "latest_snapshot": "2026-07-31",
    "distinct_snapshots": 2,
    "observed_days": 2,
    "observed_months": 1,
    "current_rows": 13955,
    "baseline_events": 13955,
    "change_events": 0,
    "current_sold_status_rows": 393,
    "event_detail": "13,955 first-observed events; 0 later change events"
  },
  "unknown_vs_zero_policy": {
    "zero": "Zero is used only when a collector completed successfully and its stored result was zero—for example, zero later listing-state changes after the baseline.",
    "unknown": "Unknown means the field cannot yet be observed or the required source is not collecting—for example, a cross-register eligibility date without a second national registry history."
  },
  "publication_rule": "This file reports collector maturity only. It must not be used as an aircraft, owner, seller, model or jurisdiction ranking."
}