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Small aircraft X had less than standard separation from air carrier Y. System error. TCASII RA evasive action taken.
| Attributes | |
| ACN | 185979 |
| Time | |
| Date | 199108 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : bna |
| State Reference | TN |
| Altitude | msl bound lower : 8000 msl bound upper : 8000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : bna |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| Experience | controller military : 4 controller radar : 6 |
| ASRS Report | 185979 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment other atc equipment : unspecified aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 0 vertical : 600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I had small aircraft X southeast of bna northbound at 8000 ft and air carrier Y off bna runway 2R sbound climbing to 10000 ft. The 2 aircraft were opposite direction. The conflict alert activated at 3 mi and 300 ft. I issued traffic and that was climbing to 10000 ft said he had the aircraft on TCAS and was 'going up'. The other aircraft said 'I need lower for traffic.' my reply was 'he had you in sight, descend and maintain 7000 ft.' this incident was controller error.
Original NASA ASRS Text
Title: SMA X HAD LTSS FROM ACR Y. SYS ERROR. TCASII RA EVASIVE ACTION TAKEN.
Narrative: I HAD SMA X SE OF BNA NBOUND AT 8000 FT AND ACR Y OFF BNA RWY 2R SBOUND CLBING TO 10000 FT. THE 2 ACFT WERE OPPOSITE DIRECTION. THE CONFLICT ALERT ACTIVATED AT 3 MI AND 300 FT. I ISSUED TFC AND THAT WAS CLBING TO 10000 FT SAID HE HAD THE ACFT ON TCAS AND WAS 'GOING UP'. THE OTHER ACFT SAID 'I NEED LOWER FOR TFC.' MY REPLY WAS 'HE HAD YOU IN SIGHT, DSND AND MAINTAIN 7000 FT.' THIS INCIDENT WAS CTLR ERROR.
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.