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An arriving air carrier in level flight receives a TCASII RA on traffic below and begins climb only to get an RA on an aircraft above.
| Attributes | |
| ACN | 242106 |
| Time | |
| Date | 199305 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : dal airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 4000 msl bound upper : 4500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dfw |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | climbout : initial |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 11500 flight time type : 200 |
| ASRS Report | 242106 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 20000 flight time type : 3000 |
| ASRS Report | 242103 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
TCASII does not know aircraft assigned altitudes. Our TCASII issued a climb RA to avoid aircraft below/behind us which would have resulted in a conflict with aircraft above, and opposite direction to our aircraft. We simply turned away from both aircraft to avoid further TCASII advisories (traffic conflicts). Approach was very busy and got behind when aircraft began turns to avoid each other.
Original NASA ASRS Text
Title: AN ARRIVING ACR IN LEVEL FLT RECEIVES A TCASII RA ON TFC BELOW AND BEGINS CLB ONLY TO GET AN RA ON AN ACFT ABOVE.
Narrative: TCASII DOES NOT KNOW ACFT ASSIGNED ALTS. OUR TCASII ISSUED A CLB RA TO AVOID ACFT BELOW/BEHIND US WHICH WOULD HAVE RESULTED IN A CONFLICT WITH ACFT ABOVE, AND OPPOSITE DIRECTION TO OUR ACFT. WE SIMPLY TURNED AWAY FROM BOTH ACFT TO AVOID FURTHER TCASII ADVISORIES (TFC CONFLICTS). APCH WAS VERY BUSY AND GOT BEHIND WHEN ACFT BEGAN TURNS TO AVOID EACH OTHER.
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.