 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
ZBW controllers described a loss of separation event when a descent clearance was issued through an occupied altitude; failing to note a conflict with an aircraft on a different frequency.
| Attributes | |
| ACN | 901181 |
| Time | |
| Date | 201007 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZBW.ARTCC |
| State Reference | NH |
| Aircraft 1 | |
| Make Model Name | Regional Jet CL65 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Route In Use | STAR IGN8 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Citation V/Ultra/Encore (C560) |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Person 1 | |
| Function | Handoff / Assist |
| Qualification | Air Traffic Control Fully Certified |
| Person 2 | |
| Function | Enroute |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Published Material / Policy |
Narrative:
I just sat down after receiving a position relief and was double checking all of the uret aircraft routes. After checking all the routes; we were only talking to a few planes. We were working the air carrier X level at FL280 on the IGN8 star to jfk less than 20 miles from our boundary. The conflict alert started going off and the aircraft Y showed FL300; interim altitude; descending to FL200 less than 5 miles from the air carrier X. Air carrier X said he was responding to a TCAS RA alert. I next observed the aircraft Y at FL289 on top of air carrier X at FL280. The next hit was air carrier X at FL272 and I believe aircraft Y at FL286. The next hit was air carrier X at FL266 and aircraft Y at FL299 and around 5 mile apart. I called R38 and got control for air carrier X and the radar descended the air carrier X to FL260. Recommendation; better awareness of traffic.
Original NASA ASRS Text
Title: ZBW controllers described a loss of separation event when a descent clearance was issued through an occupied altitude; failing to note a conflict with an aircraft on a different frequency.
Narrative: I just sat down after receiving a position relief and was double checking all of the URET aircraft routes. After checking all the routes; we were only talking to a few planes. We were working the Air Carrier X level at FL280 on the IGN8 star to JFK less than 20 miles from our boundary. The conflict alert started going off and the Aircraft Y showed FL300; interim altitude; descending to FL200 less than 5 miles from the Air Carrier X. Air Carrier X said he was responding to a TCAS RA alert. I next observed the Aircraft Y at FL289 on top of Air Carrier X at FL280. The next hit was Air Carrier X at FL272 and I believe Aircraft Y at FL286. The next hit was Air Carrier X at FL266 and Aircraft Y at FL299 and around 5 mile apart. I called R38 and got control for Air Carrier X and the RADAR descended the Air Carrier X to FL260. Recommendation; better awareness of traffic.
Data retrieved from NASA's ASRS site as of April 2012 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.