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Approach controller lost legal separation with an MD80 on the downwind leg at 5000 ft and an EMB145 descending ahead of the MD80 to 5000 ft. Controller issued turn to MD80 and advised him of traffic.
| Attributes | |
| ACN | 468161 |
| Time | |
| Date | 200003 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : phl.airport |
| State Reference | PA |
| Altitude | msl bound lower : 5000 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : phl.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude descent : vacating altitude |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : phl.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 145 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : vacating altitude descent : intermediate altitude |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 12 controller supervisory : 4 controller time certified in position1 : 5 |
| ASRS Report | 468161 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : radar other controllera |
| Resolutory Action | controller : separated traffic |
| Miss Distance | horizontal : 400 vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error other |
Narrative:
While working 2 arrival position, I had to resequence an MD80 off of the downwind for final vector. In the meantime, I had an E145 descending to 5000 ft on a downwind for final vector and I noticed the E145 was not descending fast enough, so I told the E145 to hurry descent to 5000 ft. I then turned the MD80 and gave him traffic. The second aircraft did come within less than 3 mi and 1000 ft.
Original NASA ASRS Text
Title: APCH CTLR LOST LEGAL SEPARATION WITH AN MD80 ON THE DOWNWIND LEG AT 5000 FT AND AN EMB145 DSNDING AHEAD OF THE MD80 TO 5000 FT. CTLR ISSUED TURN TO MD80 AND ADVISED HIM OF TFC.
Narrative: WHILE WORKING 2 ARR POS, I HAD TO RESEQUENCE AN MD80 OFF OF THE DOWNWIND FOR FINAL VECTOR. IN THE MEANTIME, I HAD AN E145 DSNDING TO 5000 FT ON A DOWNWIND FOR FINAL VECTOR AND I NOTICED THE E145 WAS NOT DSNDING FAST ENOUGH, SO I TOLD THE E145 TO HURRY DSCNT TO 5000 FT. I THEN TURNED THE MD80 AND GAVE HIM TFC. THE SECOND ACFT DID COME WITHIN LESS THAN 3 MI AND 1000 FT.
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.