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Air carrier Y unauthorized climb to occupied altitude had less than standard separation from air carrier X. Air carrier X TCASII TA RA evasive action taken.
| Attributes | |
| ACN | 197625 |
| Time | |
| Date | 199112 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : scy |
| State Reference | TX |
| Altitude | msl bound lower : 29000 msl bound upper : 29500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | arrival star : star |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 3500 flight time type : 300 |
| ASRS Report | 197625 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 15000 flight time type : 1200 |
| ASRS Report | 197558 |
| Events | |
| Anomaly | altitude deviation : undershoot conflict : airborne less severe non adherence : required legal separation non adherence : clearance non adherence : published procedure |
| Independent Detector | atc equipment other atc equipment : unspecified aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 6000 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During descent to FL290 received TA on TCASII at 29800. Followed by RA at 29500. RA commanded climb to 2000 ft mark on ivsi. At the time, under control of ZFW (134.02), just after the TA but before the RA, controller said 'air carrier X turn left, turn hard left.' as turn started, got RA and responded with climb while still in turn. I then got visual on air carrier Y who was climbing to FL290 and in a shallow left turn heading eastbound. Air carrier Y was not on our frequency. Ft worth controller said he did not know what air carrier Y 'was doing' and that the (ft worth controller) got a conflict alert on his equipment. Evasive action was not abrupt enough to startle or alarm passenger. Do not know if air carrier Y was aware of conflict or what error caused us both to be cleared to FL290.
Original NASA ASRS Text
Title: ACR Y UNAUTH CLB TO OCCUPIED ALT HAD LTSS FROM ACR X. ACR X TCASII TA RA EVASIVE ACTION TAKEN.
Narrative: DURING DSCNT TO FL290 RECEIVED TA ON TCASII AT 29800. FOLLOWED BY RA AT 29500. RA COMMANDED CLB TO 2000 FT MARK ON IVSI. AT THE TIME, UNDER CTL OF ZFW (134.02), JUST AFTER THE TA BUT BEFORE THE RA, CTLR SAID 'ACR X TURN L, TURN HARD L.' AS TURN STARTED, GOT RA AND RESPONDED WITH CLB WHILE STILL IN TURN. I THEN GOT VISUAL ON ACR Y WHO WAS CLBING TO FL290 AND IN A SHALLOW L TURN HDG EBOUND. ACR Y WAS NOT ON OUR FREQ. FT WORTH CTLR SAID HE DID NOT KNOW WHAT ACR Y 'WAS DOING' AND THAT THE (FT WORTH CTLR) GOT A CONFLICT ALERT ON HIS EQUIP. EVASIVE ACTION WAS NOT ABRUPT ENOUGH TO STARTLE OR ALARM PAX. DO NOT KNOW IF ACR Y WAS AWARE OF CONFLICT OR WHAT ERROR CAUSED US BOTH TO BE CLRED TO FL290.
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.