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Air carrier X climb to occupied altitude TCASII RA descend had less than standard separation from air carrier Y. System error.
| Attributes | |
| ACN | 243129 |
| Time | |
| Date | 199305 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : stl |
| State Reference | MO |
| Altitude | msl bound lower : 5400 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : stl |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 12000 flight time type : 8000 |
| ASRS Report | 243129 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 12000 vertical : 600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X cleared runway heading 125 degrees to 5000 ft. As soon as contact with departure control, cleared to 6000 ft. Turns by departure control to 170 degrees then 260 degrees. On a 260 degree heading and passing 5400 ft we had a TCASII alert to reduce rate of climb. At this time departure control advised us of air carrier Y at 2 O'clock, 600 ft above us. With a visual on air carrier Y we reduced power and descended back to 5000 ft. Air carrier Y past overhead 1000 ft above. When queried about the altitude we were assigned, the controller advised he wanted us at 5000 ft. Then we asked that the tapes be saved, which later indicated our clearance to 6000 ft.
Original NASA ASRS Text
Title: ACR X CLB TO OCCUPIED ALT TCASII RA DSND HAD LTSS FROM ACR Y. SYS ERROR.
Narrative: ACR X CLRED RWY HDG 125 DEGS TO 5000 FT. AS SOON AS CONTACT WITH DEP CTL, CLRED TO 6000 FT. TURNS BY DEP CTL TO 170 DEGS THEN 260 DEGS. ON A 260 DEG HDG AND PASSING 5400 FT WE HAD A TCASII ALERT TO REDUCE RATE OF CLB. AT THIS TIME DEP CTL ADVISED US OF ACR Y AT 2 O'CLOCK, 600 FT ABOVE US. WITH A VISUAL ON ACR Y WE REDUCED PWR AND DSNDED BACK TO 5000 FT. ACR Y PAST OVERHEAD 1000 FT ABOVE. WHEN QUERIED ABOUT THE ALT WE WERE ASSIGNED, THE CTLR ADVISED HE WANTED US AT 5000 FT. THEN WE ASKED THAT THE TAPES BE SAVED, WHICH LATER INDICATED OUR CLRNC TO 6000 FT.
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.