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ZFW controller described operational error when two aircraft were assigned the same altitude; both responding to a TCAS RA before controller realized confliction.
| Attributes | |
| ACN | 766585 |
| Time | |
| Date | 200712 |
| Place | |
| Locale Reference | airport : tpl.airport |
| State Reference | TX |
| Altitude | msl single value : 12000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw.artcc |
| Operator | other |
| Make Model Name | Super King Air 200 HDC |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : vacating altitude ground : maintenance |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zfw.artcc |
| Operator | general aviation : personal |
| Make Model Name | Beechcraft Twin Turboprop Jet Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : vacating altitude |
| Route In Use | departure sid : mares |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller limited radar : 17 controller non radar : 17 controller radar : 16 |
| ASRS Report | 766585 |
| Events | |
| Anomaly | conflict : airborne critical non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert aircraft equipment : tcas other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 6000 vertical : 600 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Inter Facility Coordination Failure |
Narrative:
Aircraft X was level at 120; nebound while on departure from grk. Aircraft Y was climbing south from pwg on the MARCS8 to sat; and appears to have been mistakenly climbed by another facility to 120. The aircraft converged and both received a TA; the BE20 in climb and the BE9 to climb.
Original NASA ASRS Text
Title: ZFW CTLR DESCRIBED OPERROR WHEN TWO ACFT WERE ASSIGNED THE SAME ALT; BOTH RESPONDING TO A TCAS RA BEFORE CTLR REALIZED CONFLICTION.
Narrative: ACFT X WAS LEVEL AT 120; NEBOUND WHILE ON DEP FROM GRK. ACFT Y WAS CLBING S FROM PWG ON THE MARCS8 TO SAT; AND APPEARS TO HAVE BEEN MISTAKENLY CLBED BY ANOTHER FACILITY TO 120. THE ACFT CONVERGED AND BOTH RECEIVED A TA; THE BE20 IN CLB AND THE BE9 TO CLB.
Data retrieved from NASA's ASRS site as of January 2009 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.