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Air carrier X TCASII TA RA climb non adherence to ATC clearance made turn had less than standard separation from fgt. System error. Evasive action taken.
| Attributes | |
| ACN | 204892 |
| Time | |
| Date | 199203 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : kwa |
| State Reference | FO |
| Altitude | msl bound lower : 30500 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : rktt tower : lax |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Fighter |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 100 flight time total : 12000 flight time type : 1000 |
| ASRS Report | 204892 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 24000 flight time type : 4000 |
| ASRS Report | 204898 |
| Events | |
| Anomaly | altitude deviation : undershoot conflict : airborne less severe non adherence : required legal separation non adherence : clearance non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action other |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 3000 vertical : 200 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X was cleared to FL310. At about FL290 TCASII indicated traffic head on at FL310. We asked taegu control if they had the traffic. Taegu control did not reply. At about FL300 the yellow TA light activated. We started a bank away from the traffic. We then received a red RA light and a climb command. Since we were in a climb we increased the power. The traffic passed off our right and the RA indicated 200 ft. It appeared to us that we received climb resolution followed by a descent resolution which we felt was contrary to the operation of the system. We recalled the event was over in seconds. Taegu control eventually confirmed the aircraft was an fgt.
Original NASA ASRS Text
Title: ACR X TCASII TA RA CLB NON ADHERENCE TO ATC CLRNC MADE TURN HAD LTSS FROM FGT. SYS ERROR. EVASIVE ACTION TAKEN.
Narrative: ACR X WAS CLRED TO FL310. AT ABOUT FL290 TCASII INDICATED TFC HEAD ON AT FL310. WE ASKED TAEGU CTL IF THEY HAD THE TFC. TAEGU CTL DID NOT REPLY. AT ABOUT FL300 THE YELLOW TA LIGHT ACTIVATED. WE STARTED A BANK AWAY FROM THE TFC. WE THEN RECEIVED A RED RA LIGHT AND A CLB COMMAND. SINCE WE WERE IN A CLB WE INCREASED THE PWR. THE TFC PASSED OFF OUR R AND THE RA INDICATED 200 FT. IT APPEARED TO US THAT WE RECEIVED CLB RESOLUTION FOLLOWED BY A DSCNT RESOLUTION WHICH WE FELT WAS CONTRARY TO THE OP OF THE SYS. WE RECALLED THE EVENT WAS OVER IN SECONDS. TAEGU CTL EVENTUALLY CONFIRMED THE ACFT WAS AN FGT.
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.