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Clt approach controller descends a faster trailing aircraft resulting in a loss of separation with a slower leading aircraft.
| Attributes | |
| ACN | 536465 |
| Time | |
| Date | 200201 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : clt.airport |
| State Reference | NC |
| Altitude | msl single value : 9000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | tracon : clt.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : clt.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Jetstream 32 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | flight time total : 200 |
| ASRS Report | 536465 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment other atc equipment : radar other controllera other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I do not recall descending the lead aircraft (A319) through the altitude of the trailing aircraft (JS32). When I observed both aircraft at 9000 ft, I had legal separation and the A319 was 30 KTS faster than the JS32. I may have had visual at the time of the descent. I just can't recall. Tmu was changing runway assignments and flowing aircraft at last min. I also had similar sounding call signs. Aircraft were not reading back clrncs correctly. We were also coming out of a noise abatement confign. It was a very busy time.
Original NASA ASRS Text
Title: CLT APCH CTLR DSNDS A FASTER TRAILING ACFT RESULTING IN A LOSS OF SEPARATION WITH A SLOWER LEADING ACFT.
Narrative: I DO NOT RECALL DSNDING THE LEAD ACFT (A319) THROUGH THE ALT OF THE TRAILING ACFT (JS32). WHEN I OBSERVED BOTH ACFT AT 9000 FT, I HAD LEGAL SEPARATION AND THE A319 WAS 30 KTS FASTER THAN THE JS32. I MAY HAVE HAD VISUAL AT THE TIME OF THE DSCNT. I JUST CAN'T RECALL. TMU WAS CHANGING RWY ASSIGNMENTS AND FLOWING ACFT AT LAST MIN. I ALSO HAD SIMILAR SOUNDING CALL SIGNS. ACFT WERE NOT READING BACK CLRNCS CORRECTLY. WE WERE ALSO COMING OUT OF A NOISE ABATEMENT CONFIGN. IT WAS A VERY BUSY TIME.
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.