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Air carrier X non adherence to ATC clearance radar vector heading had less than standard separation with air carrier Y. Pilot deviation. System error.
| Attributes | |
| ACN | 180384 |
| Time | |
| Date | 199106 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : oxi |
| State Reference | IN |
| Altitude | msl bound lower : 26500 msl bound upper : 27000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 2 controller radar : 4 |
| ASRS Report | 180384 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : clearance non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 27600 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation Operational Error |
Narrative:
Both aircraft were inbound to ord, descending and converging over a common fix (oxi). The problem arose when air carrier X was issued a heading of 280 degree to parallel air carrier Y. Air carrier X acknowledged heading but did not turn the plane. 1.5 mins later I was forced to take corrective action. When I did take corrective action air carrier X was not responsive and it took 4 transmissions to establish separation. Contributing factor: aircraft were at changeover point between 3 radar sites resulting in questionable accuracy of track. I believe that this incident should have been processed as a pilot deviation.
Original NASA ASRS Text
Title: ACR X NON ADHERENCE TO ATC CLRNC RADAR VECTOR HDG HAD LTSS WITH ACR Y. PLTDEV. SYS ERROR.
Narrative: BOTH ACFT WERE INBOUND TO ORD, DSNDING AND CONVERGING OVER A COMMON FIX (OXI). THE PROBLEM AROSE WHEN ACR X WAS ISSUED A HDG OF 280 DEG TO PARALLEL ACR Y. ACR X ACKNOWLEDGED HDG BUT DID NOT TURN THE PLANE. 1.5 MINS LATER I WAS FORCED TO TAKE CORRECTIVE ACTION. WHEN I DID TAKE CORRECTIVE ACTION ACR X WAS NOT RESPONSIVE AND IT TOOK 4 TRANSMISSIONS TO ESTABLISH SEPARATION. CONTRIBUTING FACTOR: ACFT WERE AT CHANGEOVER POINT BTWN 3 RADAR SITES RESULTING IN QUESTIONABLE ACCURACY OF TRACK. I BELIEVE THAT THIS INCIDENT SHOULD HAVE BEEN PROCESSED AS A PLTDEV.
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.