 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Incorrect application of course divergence caused less than standard separation.
| Attributes | |
| ACN | 128408 |
| Time | |
| Date | 198910 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : hub airport : iah |
| State Reference | TX |
| Altitude | msl bound lower : 5000 msl bound upper : 5000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : iah |
| Operator | common carrier : air taxi |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | climbout : initial |
| Route In Use | departure other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air taxi |
| Make Model Name | Medium Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| ASRS Report | 128408 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Miss Distance | horizontal : 12000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Atx X departed hou-aus climb 4000, atx Y at 5000 wbound to sgr 4 south hou. Traffic issued to atx X reported in sight. The atx X vectored behind and just inside or northeast of atx Y. Turned the atx X to 300 degree and climbed to 6000' to apply course divergence with atx Y. The aircraft were on other side from each other than originally thought which caused error. Error occurred due to incorrect application of course divergence.
Original NASA ASRS Text
Title: INCORRECT APPLICATION OF COURSE DIVERGENCE CAUSED LESS THAN STANDARD SEPARATION.
Narrative: ATX X DEPARTED HOU-AUS CLIMB 4000, ATX Y AT 5000 WBOUND TO SGR 4 S HOU. TFC ISSUED TO ATX X REPORTED IN SIGHT. THE ATX X VECTORED BEHIND AND JUST INSIDE OR NE OF ATX Y. TURNED THE ATX X TO 300 DEG AND CLIMBED TO 6000' TO APPLY COURSE DIVERGENCE WITH ATX Y. THE ACFT WERE ON OTHER SIDE FROM EACH OTHER THAN ORIGINALLY THOUGHT WHICH CAUSED ERROR. ERROR OCCURRED DUE TO INCORRECT APPLICATION OF COURSE DIVERGENCE.
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.