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Operational error by controller descending air carrier too soon after entering his sector causes less than standard separation.
| Attributes | |
| ACN | 101973 |
| Time | |
| Date | 198901 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : mqo |
| State Reference | DE |
| Altitude | msl bound lower : 14000 msl bound upper : 14000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | descent other |
| Route In Use | arrival star : star enroute airway : zdc |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 101973 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : required legal separation non adherence : far |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 21000 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Flight was inbound to phl on dupont arrival. I descended aircraft before it was 2 1/2 mi inside my sector. Aircraft descended faster than expected therefore conflicting with traffic holding 3 mi from my sector boundary. My poor judgement caused the error.
Original NASA ASRS Text
Title: OPERROR BY CTLR DESCENDING ACR TOO SOON AFTER ENTERING HIS SECTOR CAUSES LESS THAN STANDARD SEPARATION.
Narrative: FLT WAS INBND TO PHL ON DUPONT ARRIVAL. I DESCENDED ACFT BEFORE IT WAS 2 1/2 MI INSIDE MY SECTOR. ACFT DESCENDED FASTER THAN EXPECTED THEREFORE CONFLICTING WITH TFC HOLDING 3 MI FROM MY SECTOR BOUNDARY. MY POOR JUDGEMENT CAUSED THE ERROR.
Data retrieved from NASA's ASRS site as of August 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.