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ZDV center controllers reported a loss of separation during high traffic when two aircraft were in holding at the same altitude.
| Attributes | |
| ACN | 1466519 |
| Time | |
| Date | 201707 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZDV.ARTCC |
| State Reference | CO |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Large Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Route In Use | None |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Widebody Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Route In Use | None |
| Flight Plan | IFR |
| Person 1 | |
| Function | Enroute |
| Qualification | Air Traffic Control Developmental |
| Person 2 | |
| Function | Enroute |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance |
Narrative:
Two aircraft entering hold at same altitude. Both r-side and d-side missed it. Sector was incredibly busy because denver had just got shut off due to weather; area 4 arrivals had been rerouted to 28; on top of normal arrivals; one route; then shut off. No relief was given to sector 28 until the traffic levels got too high with all the holding. Multiple enroute aircraft pointed towards holding pattern; as the d-side I was busy taking hand offs and making sure no enroutes were pointed at the holding stack; as well as trying to move data blocks to see the aircraft. After event; a tracker was added to the position.have tmu; or supervisors; help more on spreading out the traffic and/or arrivals so it doesn't all congregate in one location. Later in that same day; sector 30 had over 40 aircraft in their sector. It was a recurring issue all day.
Original NASA ASRS Text
Title: ZDV Center controllers reported a loss of separation during high traffic when two aircraft were in holding at the same altitude.
Narrative: Two aircraft entering hold at same altitude. Both R-side and D-side missed it. Sector was incredibly busy because Denver had just got shut off due to weather; Area 4 arrivals had been rerouted to 28; on top of normal arrivals; one route; then shut off. No relief was given to sector 28 until the traffic levels got too high with all the holding. Multiple enroute aircraft pointed towards holding pattern; as the D-side I was busy taking hand offs and making sure no enroutes were pointed at the holding stack; as well as trying to move data blocks to see the aircraft. After event; a tracker was added to the position.Have TMU; or Supervisors; help more on spreading out the traffic and/or arrivals so it doesn't all congregate in one location. Later in that same day; Sector 30 had over 40 aircraft in their sector. It was a recurring issue all day.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.