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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Less than standard separation between an air carrier DC9 and an air carrier B737 at the same altitude. Operational error. No action taken by the reporter to turn or descend either aircraft to ensure separation.
| Attributes | |
| ACN | 371135 |
| Time | |
| Date | 199706 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : pit |
| State Reference | PA |
| Altitude | msl bound lower : 29000 msl bound upper : 29000 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 3 |
| ASRS Report | 371135 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | horizontal : 18000 vertical : 800 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
There were multiple aircraft in conflict prior to this situation. Other aircraft were climbing and descending to miss both involved by the time I thought I could turn each aircraft they were together. If I would have descended 1 aircraft to FL280 they would have been clean or if the 5 mi vector line would have been available I might have turned them sooner.
Original NASA ASRS Text
Title: LTSS BTWN AN ACR DC9 AND AN ACR B737 AT THE SAME ALT. OPERROR. NO ACTION TAKEN BY THE RPTR TO TURN OR DSND EITHER ACFT TO ENSURE SEPARATION.
Narrative: THERE WERE MULTIPLE ACFT IN CONFLICT PRIOR TO THIS SIT. OTHER ACFT WERE CLBING AND DSNDING TO MISS BOTH INVOLVED BY THE TIME I THOUGHT I COULD TURN EACH ACFT THEY WERE TOGETHER. IF I WOULD HAVE DSNDED 1 ACFT TO FL280 THEY WOULD HAVE BEEN CLEAN OR IF THE 5 MI VECTOR LINE WOULD HAVE BEEN AVAILABLE I MIGHT HAVE TURNED THEM SOONER.
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.