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Air carrier has TCASII RA after being cleared for visual approach. ATC confuses by calling for a turn already established. Wrong call sign used.
| Attributes | |
| ACN | 216200 |
| Time | |
| Date | 199207 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : slc |
| State Reference | UT |
| Altitude | msl bound lower : 7000 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : slc |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent : approach |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial |
| Experience | flight time last 90 days : 90 flight time total : 2500 flight time type : 500 |
| ASRS Report | 216200 |
| 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 anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 4500 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Cleared in visual approach to 34L, TCASII indicated conflicting traffic and evasive maneuver was required. Approach control confused complicated situation by giving a call to turn left to 280 degrees when already established on a base turn. In followup telephone conversation with approach control, it was learned that the controller used wrong call sign when giving instructions to turn to 280. Conflict was resolved by each aircraft's individual initiative to maneuver and avoid each other.
Original NASA ASRS Text
Title: ACR HAS TCASII RA AFTER BEING CLRED FOR VISUAL APCH. ATC CONFUSES BY CALLING FOR A TURN ALREADY ESTABLISHED. WRONG CALL SIGN USED.
Narrative: CLRED IN VISUAL APCH TO 34L, TCASII INDICATED CONFLICTING TFC AND EVASIVE MANEUVER WAS REQUIRED. APCH CTL CONFUSED COMPLICATED SITUATION BY GIVING A CALL TO TURN L TO 280 DEGS WHEN ALREADY ESTABLISHED ON A BASE TURN. IN FOLLOWUP TELEPHONE CONVERSATION WITH APCH CTL, IT WAS LEARNED THAT THE CTLR USED WRONG CALL SIGN WHEN GIVING INSTRUCTIONS TO TURN TO 280. CONFLICT WAS RESOLVED BY EACH ACFT'S INDIVIDUAL INITIATIVE TO MANEUVER AND AVOID EACH OTHER.
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.