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Two aircraft at the same altitude were entering the ARTCC (ZHU) airspace on non-radar oceanic routes. The flight plan information ARTCC had indicated the two routes were separated. One of the aircraft saw the other aircraft and asked the ARTCC about the traffic. ARTCC had the aircraft verify their route and realized one of the aircraft was on a different route than ARTCC had on the flight plan. The controller descended one of the aircraft to ensure separation.
| Attributes | |
| ACN | 1303741 |
| Time | |
| Date | 201510 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZHU.ARTCC |
| State Reference | TX |
| Environment | |
| Light | Dawn |
| Aircraft 1 | |
| Make Model Name | Large Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Route In Use | Oceanic |
| 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 | Oceanic |
| Flight Plan | IFR |
| Person 1 | |
| Function | Oceanic |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 7 |
| Person 2 | |
| Function | Oceanic |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) .5 |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Clearance |
Narrative:
I arrived at the same time as another controller. We received a briefing and he was working ocean/offshore sectors while I controlled the domestic sectors. Shortly after taking the position I heard aircraft Y ask if there was traffic at the same altitude in proximity to him. [The controller] informed him that there was traffic at FL380 feet on an adjacent airway. Aircraft Y was ipsev.L207.seagl... And aircraft X was (according to the flight strips and our knowledge) dutna.L208.peglg... These routes are parallel and non-radar separated. The controller asked aircraft X to give his position from peglg and he responded that he was approximately 40 miles south of seagl. The controller asked him to verify his routing; to which he responded that he was cleared dutna..seagl.L207... The controller immediately descended aircraft X to FL370 feet to establish vertical separation. The supervisor was notified right away.I can't begin to recommend a remedy to this problem because I can't figure out where the breakdown began. The flight plan information (strips) that we received from mmid center showed aircraft X on L208; but he stated that [departure airport] issued him dutna direct seagl. The breakdown was somewhere between [departure airport] and mmid center.
Original NASA ASRS Text
Title: Two aircraft at the same altitude were entering the ARTCC (ZHU) airspace on non-radar Oceanic routes. The flight plan information ARTCC had indicated the two routes were separated. One of the aircraft saw the other aircraft and asked the ARTCC about the traffic. ARTCC had the aircraft verify their route and realized one of the aircraft was on a different route than ARTCC had on the flight plan. The controller descended one of the aircraft to ensure separation.
Narrative: I arrived at the same time as another controller. We received a briefing and he was working Ocean/Offshore sectors while I controlled the Domestic sectors. Shortly after taking the position I heard Aircraft Y ask if there was traffic at the same altitude in proximity to him. [The controller] informed him that there was traffic at FL380 feet on an adjacent airway. Aircraft Y was IPSEV.L207.SEAGL... and Aircraft X was (according to the flight strips and our knowledge) DUTNA.L208.PEGLG... These routes are parallel and non-RADAR separated. The controller asked Aircraft X to give his position from PEGLG and he responded that he was approximately 40 miles south of SEAGL. The controller asked him to verify his routing; to which he responded that he was cleared DUTNA..SEAGL.L207... The controller immediately descended Aircraft X to FL370 feet to establish vertical separation. The supervisor was notified right away.I can't begin to recommend a remedy to this problem because I can't figure out where the breakdown began. The flight plan information (strips) that we received from MMID center showed Aircraft X on L208; but he stated that [departure airport] issued him DUTNA direct SEAGL. The breakdown was somewhere between [departure airport] and MMID center.
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.