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B734 flight crew in descent for approach execute evasive maneuver due to small fixed wing aircraft flying across slc ILS runway 34R final, not under TA's.
| Attributes | |
| ACN | 505460 |
| Time | |
| Date | 200103 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| State Reference | UT |
| Altitude | msl bound lower : 11000 msl bound upper : 11800 |
| Environment | |
| Flight Conditions | Mixed |
| Weather Elements | Thunderstorm |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : s56.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 34r |
| Flight Phase | descent : approach |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : s56.tracon |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Fixed Gear |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Route In Use | approach : instrument precision |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : private pilot : multi engine pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 125 flight time total : 13240 flight time type : 3420 |
| ASRS Report | 505460 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne critical |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Miss Distance | horizontal : 800 |
| Supplementary | |
| Problem Areas | Airspace Structure ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
While inbound on slc runway 34R localizer, we were cleared to descend from 11000 ft to 9000 ft. Shortly after beginning descent, copilot flying, we received a TCASII 'climb' command. No TA's were received prior to this. On our radar TCASII display, a target close, directly on the nose. First officer began climb -- guidance commanded 4000 FPM climb. Traffic acquired visually as we went through 10500 ft. It was a single engine, low wing, fixed gear type. Climbed through 11500 ft before clear of conflict received. Leveled off at 11800 ft. Reported to ATC this event. Controller had no radar contact with this aircraft.
Original NASA ASRS Text
Title: B734 FLC IN DSCNT FOR APCH EXECUTE EVASIVE MANEUVER DUE TO SMALL FIXED WING ACFT FLYING ACROSS SLC ILS RWY 34R FINAL, NOT UNDER TA'S.
Narrative: WHILE INBOUND ON SLC RWY 34R LOC, WE WERE CLRED TO DSND FROM 11000 FT TO 9000 FT. SHORTLY AFTER BEGINNING DSCNT, COPLT FLYING, WE RECEIVED A TCASII 'CLB' COMMAND. NO TA'S WERE RECEIVED PRIOR TO THIS. ON OUR RADAR TCASII DISPLAY, A TARGET CLOSE, DIRECTLY ON THE NOSE. FO BEGAN CLB -- GUIDANCE COMMANDED 4000 FPM CLB. TFC ACQUIRED VISUALLY AS WE WENT THROUGH 10500 FT. IT WAS A SINGLE ENG, LOW WING, FIXED GEAR TYPE. CLBED THROUGH 11500 FT BEFORE CLR OF CONFLICT RECEIVED. LEVELED OFF AT 11800 FT. RPTED TO ATC THIS EVENT. CTLR HAD NO RADAR CONTACT WITH THIS ACFT.
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.