TCAS advisoriesCessna Citation CJ4
Citation CJ4 N257DV and a Boeing 767 were 2.5 nautical miles apart
The CJ4 transmitted a "Level Off" advisory. Vertical spacing between the aircraft was 1,025 feet at their minimum horizontal separation.
N257DV transmitted a "Level Off" advisory during an encounter with another aircraft on October 4, 2026. Their minimum horizontal separation in the recorded tracks was 2.5 nautical miles, with 1,025 feet of vertical spacing at that point. The aircraft database lists N257DV as a Cessna Citation CJ4 and the other aircraft, C-GDUZ, as a Boeing 767-300.
The CJ4 is a light business jet. Its vertical rate fell by 2,112 feet per minute after the advisory in this 31-second episode, reconstructed from saved archive tracks. A TCAS resolution advisory is an automatic collision-avoidance instruction; this broadcast does not establish a near miss or a loss of separation.
About the Cessna Citation CJ4
- The Cessna Citation CJ4 is a light business jet.
Recorded data for N257DV
| Observed | to |
|---|---|
| Event type | Transponder reports |
| Recorded source | ADS-B, ICAO address |
| Post date | |
| Last revised |
| Aircraft type | CESSNA 525C Citation CJ4 |
|---|---|
| Type designator | C25C |
| Tail number (registration) | N257DV |
| Callsign | N257DV |
| ICAO address | A271DE |
| Aircraft named in the advisory | C-GDUZ · ACA7303 · B763 ICAO address C04EB6 Source: ADS-B, ICAO address Closest horizontal separation between the aircraft: 2.5 NM Vertical separation at closest approach: 1,025 ft |
|---|
Measurements
Displayed measurements may be rounded.
| Ground speed | 466.8 kn |
|---|---|
| Pressure altitude | 32,975 ft |
| Geometric altitude | 33,675 ft |
| Archived altitude; reference not retained | 32,975 ft |
| Geometric-altitude vertical rate | 192 ft/min |
| Callsign | N257DV |
|---|---|
| Transponder code | 3146 |
| Distinct reports after collapsing repeats | 11 samples |
|---|---|
| Closest horizontal separation between the aircraft | 2.5 NM |
| Vertical separation at closest approach | 1,025 ft |
| Aircraft involved | 2 aircraft |
| Vertical-rate change after the advisory | -2,112 ft/min |
| Episode duration | 30.93 s |
| Telemetry samples | 16 samples |
| Resolution advisory text | Level Off |
Record details
Public event ID: 9ac858a9-9696-49.
Record revision: 3.
Evidence version: 0351645dc75631f2.