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ZFW controller and A321 pilot reported a conflict with a military aircraft. Crew followed ATC clearance to turn; and responded to TCAS RA.
| Attributes | |
| ACN | 1529281 |
| Time | |
| Date | 201803 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZFW.ARTCC |
| State Reference | TX |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | A321 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Military Bomber |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Person 1 | |
| Function | Enroute |
| Qualification | Air Traffic Control Fully Certified |
| Person 2 | |
| Function | Pilot Flying |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Conflict Airborne Conflict Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance |
Narrative:
I was training an right side developmental on woven H. We had aircraft X stopped at FL260 below aircraft Y flights block. I looked up from writing a note for my training report when I saw the aircraft Y and aircraft X flashing. From what I can remember; aircraft Y's wingman was at FL262 then dropped to FL252; to the best of my recollection. I saw that aircraft X was in a bad position; so I decided to turn the aircraft X so he wasn't underneath the flight if something was happening with aircraft Y. After I issued the turn; aircraft X reported a TCAS RA and said they were climbing! Aircraft X executed the RA maneuver and then reported back to FL260. When I questioned aircraft Y; he said they were having an altimeter or altitude issue. I wasn't sure to what extent the problem was so I asked them to stop altitude squawk. They continued on their flight path without further incident in my airspace. Aircraft X questioned me about the incident and what the issue was. I told him as much as I knew and that I had reported the issue. I believe this was just an isolated incident that shouldn't happen again. Both aircraft were assigned altitudes that gave the appropriate radar separation. This was an equipment malfunction.
Original NASA ASRS Text
Title: ZFW controller and A321 pilot reported a conflict with a military aircraft. Crew followed ATC clearance to turn; and responded to TCAS RA.
Narrative: I was training an R side developmental on WOVEN H. We had Aircraft X stopped at FL260 below Aircraft Y flights block. I looked up from writing a note for my training report when I saw the Aircraft Y and Aircraft X flashing. From what I can remember; Aircraft Y's wingman was at FL262 then dropped to FL252; to the best of my recollection. I saw that Aircraft X was in a bad position; so I decided to turn the Aircraft X so he wasn't underneath the flight if something was happening with Aircraft Y. After I issued the turn; Aircraft X reported a TCAS RA and said they were climbing! Aircraft X executed the RA maneuver and then reported back to FL260. When I questioned Aircraft Y; he said they were having an altimeter or altitude issue. I wasn't sure to what extent the problem was so I asked them to stop altitude squawk. They continued on their flight path without further incident in my airspace. Aircraft X questioned me about the incident and what the issue was. I told him as much as I knew and that I had reported the issue. I believe this was just an isolated incident that shouldn't happen again. Both aircraft were assigned altitudes that gave the appropriate radar separation. This was an equipment malfunction.
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.