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Air carrier X uncoord unauthorized penetration of airspace, descent through occupied altitude had less than standard separation from Y. System error.
| Attributes | |
| ACN | 279326 |
| Time | |
| Date | 199408 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : bdr |
| State Reference | CT |
| Altitude | msl bound lower : 5000 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90 |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 2 |
| ASRS Report | 279326 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 6000 vertical : 100 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X was deviating northbound around WX descending. The clearance to 3000 ft should have been sufficient to maintain separation. X descended much slower than expected or normally given. The head pilot for company was here earlier this yr and said everyone of his aircraft can give a 3000 fph descent. This one did not. After issuing the descent clearance I began to set up and align my radar scope in accordance with my facilities position relief policy. I could not turn the aircraft on course due to another slower aircraft on his route of a conflicting altitude. Left my airspace by approximately 1.5 mi and came into conflict with aircraft Y in another controller's airspace. I asked the X to expedite his descent but I was not advised by the pilot that it would be less than usual.
Original NASA ASRS Text
Title: ACR X UNCOORD UNAUTH PENETRATION OF AIRSPACE, DSCNT THROUGH OCCUPIED ALT HAD LTSS FROM Y. SYS ERROR.
Narrative: ACR X WAS DEVIATING NBOUND AROUND WX DSNDING. THE CLRNC TO 3000 FT SHOULD HAVE BEEN SUFFICIENT TO MAINTAIN SEPARATION. X DSNDED MUCH SLOWER THAN EXPECTED OR NORMALLY GIVEN. THE HEAD PLT FOR COMPANY WAS HERE EARLIER THIS YR AND SAID EVERYONE OF HIS ACFT CAN GIVE A 3000 FPH DSCNT. THIS ONE DID NOT. AFTER ISSUING THE DSCNT CLRNC I BEGAN TO SET UP AND ALIGN MY RADAR SCOPE IN ACCORDANCE WITH MY FACILITIES POS RELIEF POLICY. I COULD NOT TURN THE ACFT ON COURSE DUE TO ANOTHER SLOWER ACFT ON HIS RTE OF A CONFLICTING ALT. LEFT MY AIRSPACE BY APPROX 1.5 MI AND CAME INTO CONFLICT WITH ACFT Y IN ANOTHER CTLR'S AIRSPACE. I ASKED THE X TO EXPEDITE HIS DSCNT BUT I WAS NOT ADVISED BY THE PLT THAT IT WOULD BE LESS THAN USUAL.
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.