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ARTCC controller failed to maintain legal separation with a beech 58 and a C421 when permitting the B58 to deviate from assigned course and not knowing that the C421 was coming from another sector would cause a confliction.
| Attributes | |
| ACN | 470812 |
| Time | |
| Date | 200004 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : cap.vortac |
| State Reference | TX |
| Altitude | msl single value : 20000 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw.artcc |
| Operator | general aviation : personal |
| Make Model Name | Baron 58/58TC |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zfw.artcc |
| Operator | general aviation : personal |
| Make Model Name | Golden Eagle 421 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 30 controller time certified in position1 : 2 |
| ASRS Report | 470812 |
| Person 2 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : private pilot : multi engine pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : s radar other controllera |
| Resolutory Action | controller : separated traffic controller : issued new clearance |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft #1 was wbound at FL200 about to enter my airspace. Pilot request to deviate. Unaware of aircraft #2 south bound in the adjacent sector, I approved the deviation. Aircraft #2 was being vectored behind aircraft #1. When aircraft #2 handoff began to flash, I recognized the potential error developing and turned aircraft #1 to the left, away from aircraft #2. Separation was lost.
Original NASA ASRS Text
Title: ARTCC CTLR FAILED TO MAINTAIN LEGAL SEPARATION WITH A BEECH 58 AND A C421 WHEN PERMITTING THE B58 TO DEVIATE FROM ASSIGNED COURSE AND NOT KNOWING THAT THE C421 WAS COMING FROM ANOTHER SECTOR WOULD CAUSE A CONFLICTION.
Narrative: ACFT #1 WAS WBOUND AT FL200 ABOUT TO ENTER MY AIRSPACE. PLT REQUEST TO DEVIATE. UNAWARE OF ACFT #2 S BOUND IN THE ADJACENT SECTOR, I APPROVED THE DEV. ACFT #2 WAS BEING VECTORED BEHIND ACFT #1. WHEN ACFT #2 HDOF BEGAN TO FLASH, I RECOGNIZED THE POTENTIAL ERROR DEVELOPING AND TURNED ACFT #1 TO THE L, AWAY FROM ACFT #2. SEPARATION WAS LOST.
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.