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An aircraft approaching in visual conditions from below in class a airspace causes a TCASII RA that is not followed.
| Attributes | |
| ACN | 583786 |
| Time | |
| Date | 200306 |
| Day | Thu |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl bound lower : 27000 msl bound upper : 28000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 145 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zzz.artcc |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise : level |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 583786 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : company policies non adherence : published procedure other spatial deviation |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | flight crew : returned to intended or assigned course flight crew : took precautionary avoidance action |
| Miss Distance | vertical : 700 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
Narrative:
FL280 and noticed visually a converging target climbing 1200 ft below. Target continued climbing and converging. There was no notice given by ATC. Inquiry to ATC was stepped on, and we made another inquiry just as we received a climb RA. At that time, the TCASII read a 700 ft difference, and ATC responded the traffic was level at FL270. With visual contact, we remained at FL280, but had made a 20 degree left turn to avoid direct convergence. We did not deviation from the airway, and turned back on course. A more timely notification, or any notification, from ATC would have been appreciated and possibly avoided this RA.
Original NASA ASRS Text
Title: AN ACFT APCHING IN VISUAL CONDITIONS FROM BELOW IN CLASS A AIRSPACE CAUSES A TCASII RA THAT IS NOT FOLLOWED.
Narrative: FL280 AND NOTICED VISUALLY A CONVERGING TARGET CLBING 1200 FT BELOW. TARGET CONTINUED CLBING AND CONVERGING. THERE WAS NO NOTICE GIVEN BY ATC. INQUIRY TO ATC WAS STEPPED ON, AND WE MADE ANOTHER INQUIRY JUST AS WE RECEIVED A CLB RA. AT THAT TIME, THE TCASII READ A 700 FT DIFFERENCE, AND ATC RESPONDED THE TFC WAS LEVEL AT FL270. WITH VISUAL CONTACT, WE REMAINED AT FL280, BUT HAD MADE A 20 DEG L TURN TO AVOID DIRECT CONVERGENCE. WE DID NOT DEV FROM THE AIRWAY, AND TURNED BACK ON COURSE. A MORE TIMELY NOTIFICATION, OR ANY NOTIFICATION, FROM ATC WOULD HAVE BEEN APPRECIATED AND POSSIBLY AVOIDED THIS RA.
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.