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Three center controllers reported an operational error. A controller requests altitude from another centers sector controller and gives them a choice of altitudes. Receiving controller picks one of the three altitudes. Transferring controller issues altitude to aircraft. Two aircraft have a los of separation due to the aircraft descending into the level aircraft's airspace.
| Attributes | |
| ACN | 1331874 |
| Time | |
| Date | 201602 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZJX.ARTCC |
| State Reference | FL |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| 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 | Enroute |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 5 |
| Person 2 | |
| Function | Enroute |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 29 |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Clearance |
Narrative:
While working 86; I descended aircraft Y to cross whitl intersection at FL350. I then flashed the aircraft to cigar (R08) for a handoff. This is a routine crossing and handoff to mia R08 sector. Mia R08 took the handoff and I switched the aircraft to their frequency. A few minutes later I noticed aircraft X flashing at me south of the active warning area and coordinated with R08. After 3 attempts I finally got the controller on the shout line and asked if he/she wanted to descend aircraft Y underneath or go across the top of aircraft X at FL360. I explained that I coordinated with sector 16 (my low side sector) that they can take aircraft Y to FL340 or FL330. The R08 controller explained that he/she would go over the top at FL360 and put in an interim altitude of 36;000 ft. A few minutes later I witnessed the two aircraft approaching whitl and notice that aircraft Y descending below FL360. As I realized aircraft Y was at FL357 I advised aircraft X to turn 30 degrees to the left; as he started to execute the turn the pilot explained that he was responding to an RA climb. I rogered him and when he was finished I advised aircraft X to maintain FL360 and process to plyer intersection on course. I was advised by the controller in charge (controller in charge) that mia called and we printed strips on both aircraft.
Original NASA ASRS Text
Title: Three Center controllers reported an operational error. A Controller requests altitude from another centers sector controller and gives them a choice of altitudes. Receiving controller picks one of the three altitudes. Transferring controller issues altitude to aircraft. Two aircraft have a los of separation due to the aircraft descending into the level aircraft's airspace.
Narrative: While working 86; I descended Aircraft Y to cross WHITL intersection at FL350. I then flashed the aircraft to Cigar (R08) for a handoff. This is a routine crossing and handoff to MIA R08 sector. MIA R08 took the handoff and I switched the aircraft to their frequency. A few minutes later I noticed Aircraft X flashing at me south of the active warning area and coordinated with R08. After 3 attempts I finally got the controller on the shout line and asked if he/she wanted to descend Aircraft Y underneath or go across the top of Aircraft X at FL360. I explained that I coordinated with sector 16 (my low side sector) that they can take Aircraft Y to FL340 or FL330. The R08 controller explained that he/she would go over the top at FL360 and put in an interim altitude of 36;000 ft. A few minutes later I witnessed the two aircraft approaching WHITL and notice that Aircraft Y descending below FL360. As I realized Aircraft Y was at FL357 I advised Aircraft X to turn 30 degrees to the left; as he started to execute the turn the pilot explained that he was responding to an RA climb. I rogered him and when he was finished I advised Aircraft X to maintain FL360 and process to PLYER intersection on course. I was advised by the CIC (Controller in Charge) that MIA called and we printed strips on both aircraft.
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.