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HS125 flight crew experienced TCAS RA at FL370 with opposite direction descending traffic ATC operational error recorded.
| Attributes | |
| ACN | 691206 |
| Time | |
| Date | 200603 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : sav.vortac |
| State Reference | GA |
| Altitude | msl single value : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx.artcc |
| Operator | general aviation : corporate |
| Make Model Name | BAe 125 Series 800 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zjx.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 5900 flight time type : 200 |
| ASRS Report | 691206 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Events | |
| Anomaly | conflict : airborne critical non adherence : required legal separation |
| Independent Detector | aircraft equipment : tcas other controllera |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 6000 vertical : 400 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
While in cruise at FL370 going direct to sav at approximately 60 NM south of sav our TCAS gave us a traffic alert of an aircraft descending towards us. While looking for the traffic; we received an RA that instructed us to descend. I turned off the autoplt and made a 30 degree left turn while descending. At FL360; I received a 'clear of conflict' alert from the TCAS; at which time I notified ATC that I diverted from altitude to FL360 and was in the process of climbing back up to FL370. The other aircraft also reported a TA/RA. The minimum distance between us was less than 1 mi horizontally and 400 ft vertically.
Original NASA ASRS Text
Title: HS125 FLT CREW EXPERIENCED TCAS RA AT FL370 WITH OPPOSITE DIRECTION DSNDING TFC ATC OPERROR RECORDED.
Narrative: WHILE IN CRUISE AT FL370 GOING DIRECT TO SAV AT APPROX 60 NM S OF SAV OUR TCAS GAVE US A TFC ALERT OF AN ACFT DSNDING TOWARDS US. WHILE LOOKING FOR THE TFC; WE RECEIVED AN RA THAT INSTRUCTED US TO DSND. I TURNED OFF THE AUTOPLT AND MADE A 30 DEG L TURN WHILE DSNDING. AT FL360; I RECEIVED A 'CLR OF CONFLICT' ALERT FROM THE TCAS; AT WHICH TIME I NOTIFIED ATC THAT I DIVERTED FROM ALT TO FL360 AND WAS IN THE PROCESS OF CLBING BACK UP TO FL370. THE OTHER ACFT ALSO RPTED A TA/RA. THE MINIMUM DISTANCE BTWN US WAS LESS THAN 1 MI HORIZLY AND 400 FT VERTLY.
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.