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Cleveland center controllers reported a loss of separation when the radar controller climbed an aircraft through the altitude of another aircraft. Radar controller gave instructions to climbing pilot to be level in two minutes. Pilot did not comply and vectoring both aircraft did not help the separation loss.
| Attributes | |
| ACN | 1402612 |
| Time | |
| Date | 201611 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZOB.ARTCC |
| State Reference | OH |
| Aircraft 1 | |
| Make Model Name | B737-900 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Person 1 | |
| Function | Enroute |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 13 |
| Person 2 | |
| Function | Enroute Handoff / Assist |
| 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 - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types |
Narrative:
Aircraft X southeast bound at FL370. Aircraft Y checked on at FL360 and asked for FL380. Aircraft were approximately 3 minutes from separation loss. Asked aircraft Y if they could be level in 2 minutes leaving a little extra time. Aircraft Y said yes; so I climbed aircraft Y to FL380 to be level in 2 minutes. A short while later the aircraft Y said they could not make the restriction so I immediately turned aircraft Y 40 degrees right. I then turned aircraft X 20 degrees right and they did not respond right at first. Eventually they responded and started to turn. I'm still not sure if there was separation loss. Aircraft Y eventually responded level at FL380 in that sequence of events too.I would not change anything. Just an unfortunate turn of events when the pilot said they could not make the restriction.
Original NASA ASRS Text
Title: Cleveland Center Controllers reported a loss of separation when the Radar Controller climbed an aircraft through the altitude of another aircraft. Radar Controller gave instructions to climbing pilot to be level in two minutes. Pilot did not comply and vectoring both aircraft did not help the separation loss.
Narrative: Aircraft X southeast bound at FL370. Aircraft Y checked on at FL360 and asked for FL380. Aircraft were approximately 3 minutes from separation loss. Asked aircraft Y if they could be level in 2 minutes leaving a little extra time. Aircraft Y said yes; so I climbed aircraft Y to FL380 to be level in 2 minutes. A short while later the aircraft Y said they could not make the restriction so I immediately turned aircraft Y 40 degrees right. I then turned aircraft X 20 degrees right and they did not respond right at first. Eventually they responded and started to turn. I'm still not sure if there was separation loss. Aircraft Y eventually responded level at FL380 in that sequence of events too.I would not change anything. Just an unfortunate turn of events when the pilot said they could not make the restriction.
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.