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Air carrier X TCASII RA with VFR aircraft above class B airspace. Evasive action taken. See and avoid concept.
| Attributes | |
| ACN | 270846 |
| Time | |
| Date | 199405 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : atl |
| State Reference | GA |
| Altitude | msl bound lower : 12300 msl bound upper : 12300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : atl artcc : zme |
| Operator | common carrier : air carrier |
| Make Model Name | MD-88 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller military : 3 controller non radar : 1 controller radar : 14 controller supervisory : 3 |
| ASRS Report | 270846 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : clearance other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| 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 | other |
Narrative:
Air carrier X, md-88, was climbing eastbound out of 12300 ft. Pilot advised he was getting an RA and descended to 12000 ft. I then observed a VFR target northbound at 12700 ft just above class B airspace (top of class B airspace 12500 ft). I had not observed VFR aircraft Y target prior to the pilot advising of the RA due to workload. This was a good RA that did provide an extra degree of safety for X.
Original NASA ASRS Text
Title: ACR X TCASII RA WITH VFR ACFT ABOVE CLASS B AIRSPACE. EVASIVE ACTION TAKEN. SEE AND AVOID CONCEPT.
Narrative: ACR X, MD-88, WAS CLBING EBOUND OUT OF 12300 FT. PLT ADVISED HE WAS GETTING AN RA AND DSNDED TO 12000 FT. I THEN OBSERVED A VFR TARGET NBOUND AT 12700 FT JUST ABOVE CLASS B AIRSPACE (TOP OF CLASS B AIRSPACE 12500 FT). I HAD NOT OBSERVED VFR ACFT Y TARGET PRIOR TO THE PLT ADVISING OF THE RA DUE TO WORKLOAD. THIS WAS A GOOD RA THAT DID PROVIDE AN EXTRA DEGREE OF SAFETY FOR X.
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.