Airspace (FIR)
Bucarest FIR (LRBB)
Regions that include this airspace
The region page summarises this FIR together with neighbouring airspaces.
Recent events in this FIR
Medium- and high-confidence integrity-drop events seen in this airspace over the last 7 days.
- 2026-10-2023 aircraft affected
- 2026-10-209 aircraft affected
- 2026-10-205 aircraft affected
- 2026-10-2018 aircraft affected
- 2026-10-2010 aircraft affected
Longer history in this region
Integrity drop events with medium or high observation sufficiency for Bucarest FIR (LRBB), year by year (from the days in the archive).
| Year | Events | Days with events | Observation level |
|---|---|---|---|
| 2023 | 162 | 105 / 318 | %43 · Moderate |
| 2024 | 1048 | 291 / 366 | %65 · Moderate |
| 2025 | 1469 | 357 / 361 | %82 · Strong |
| 2026 | 1634 | 280 / 283 | %86 · Strong |
The observation level is that year's observed aircraft-hours as a share of today's level. As the adsb.lol receiver network grew, observation grew; event counts in low-level years cannot be compared with today's. An event is one cluster of adjacent cell-hours: several unconnected clusters on the same day count as separate events and midnight splits an event in two, so the event count is not a number of separate incidents. This is not a trend or risk claim.
FIR boundaries are based on EUROCONTROL Network Manager data. An indicator only; no observation does not mean no interference.
Based on observed ADS-B data; not an operational navigation source. It does not state a source or cause. See the methodology page for the general framework.