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Flight crew of an medium large transport stopped descent and climbed in response to a TCASII RA. Visual sighting of the other aircraft and a change in altitude assignment by ATC.
| Attributes | |
| ACN | 335602 |
| Time | |
| Date | 199605 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : atl |
| State Reference | GA |
| Altitude | msl bound lower : 6000 msl bound upper : 8600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : atl |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | arrival other enroute airway : atl |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 10900 flight time type : 2330 |
| ASRS Report | 335608 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
During approach into atlanta, approach controller cleared us to descend from 10000 to 6000 ft. Passing through 9000 ft we got a TCASII traffic alert for an aircraft at our 1 to 1:30 O'clock position a couple mi out. We picked up aircraft, a light twin, visually. At 8600 ft a different voice on approach control said to level at 9000 ft. Almost immediately we got a TCASII RA to climb. I kicked off the autoplt and quickly climbed back to 9000 ft. The other aircraft passed directly under us at 8000 ft according to TCASII information. No further comments were made by approach control. Other aircraft's pilot apparently did not see us. TCASII sure helped out.
Original NASA ASRS Text
Title: FLC OF AN MLG STOPPED DSCNT AND CLBED IN RESPONSE TO A TCASII RA. VISUAL SIGHTING OF THE OTHER ACFT AND A CHANGE IN ALT ASSIGNMENT BY ATC.
Narrative: DURING APCH INTO ATLANTA, APCH CTLR CLRED US TO DSND FROM 10000 TO 6000 FT. PASSING THROUGH 9000 FT WE GOT A TCASII TFC ALERT FOR AN ACFT AT OUR 1 TO 1:30 O'CLOCK POS A COUPLE MI OUT. WE PICKED UP ACFT, A LIGHT TWIN, VISUALLY. AT 8600 FT A DIFFERENT VOICE ON APCH CTL SAID TO LEVEL AT 9000 FT. ALMOST IMMEDIATELY WE GOT A TCASII RA TO CLB. I KICKED OFF THE AUTOPLT AND QUICKLY CLBED BACK TO 9000 FT. THE OTHER ACFT PASSED DIRECTLY UNDER US AT 8000 FT ACCORDING TO TCASII INFO. NO FURTHER COMMENTS WERE MADE BY APCH CTL. OTHER ACFT'S PLT APPARENTLY DID NOT SEE US. TCASII SURE HELPED OUT.
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.