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Aircraft X took a climb clearance meant for aircraft Z. This resulted in a loss of separation with aircraft X.
| Attributes | |
| ACN | 445742 |
| Time | |
| Date | 199908 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : mol.vor |
| State Reference | VA |
| Altitude | msl bound lower : 29000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 29 controller radar : 29 |
| ASRS Report | 445742 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : required legal separation other anomaly other |
| Independent Detector | atc equipment other atc equipment : error detection |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action none taken : detected after the fact |
| Miss Distance | horizontal : 10500 vertical : 1400 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I issued a clearance to aircraft Z to FL330. 2 aircraft responded. I verified aircraft Z's clearance and attempted, unsuccessfully, to determine who the other aircraft was. Shortly thereafter conflict alert activated between aircraft X and aircraft Y. Aircraft Y at FL310, aircraft X assigned FL290, mode C showing FL295. I reclred aircraft X back to FL290. Aircraft X was the other aircraft but he didn't respond to my original query about taking a clearance.
Original NASA ASRS Text
Title: ACFT X TOOK A CLB CLRNC MEANT FOR ACFT Z. THIS RESULTED IN A LOSS OF SEPARATION WITH ACFT X.
Narrative: I ISSUED A CLRNC TO ACFT Z TO FL330. 2 ACFT RESPONDED. I VERIFIED ACFT Z'S CLRNC AND ATTEMPTED, UNSUCCESSFULLY, TO DETERMINE WHO THE OTHER ACFT WAS. SHORTLY THEREAFTER CONFLICT ALERT ACTIVATED BTWN ACFT X AND ACFT Y. ACFT Y AT FL310, ACFT X ASSIGNED FL290, MODE C SHOWING FL295. I RECLRED ACFT X BACK TO FL290. ACFT X WAS THE OTHER ACFT BUT HE DIDN'T RESPOND TO MY ORIGINAL QUERY ABOUT TAKING A CLRNC.
Data retrieved from NASA's ASRS site as of July 2007 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.