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Medium large transport on vectors to approach has close proximity with second aircraft on approach who receives TCASII alert.
| Attributes | |
| ACN | 243561 |
| Time | |
| Date | 199306 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dtw |
| State Reference | MI |
| Altitude | msl bound lower : 3400 msl bound upper : 3400 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dtw |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 180 flight time total : 13000 flight time type : 8000 |
| ASRS Report | 243561 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | other |
Narrative:
Approaching dtw we were assigned a 090 degree heading, 210 KTS, and descend to 3000 ft. Approach control frequency very busy. We were approximately 15 DME out on left base to runway 3L. As we began to get closer to 3L centerline, both captain and first officer questioned each other and believed we had received no approach clearance. We saw an large transport at our 2 O'clock high on final to 3R. We were unable to question approach control due to frequency congestion. I began slowing aircraft and began a slow left turn back toward 3L centerline. At no time did we feel we were in danger and visually, everything seemed safe. At this time the approach controller issued us an approach clearance. We landed normally, as did the large transport on runway 3R. Apparently, large transport got a TCASII RA. We were not TCASII equipped. I'd say the TCASII worked as designed. I do not know how close we got to the large transport but no go around or evasive maneuvers were taken by either aircraft.
Original NASA ASRS Text
Title: MLG ON VECTORS TO APCH HAS CLOSE PROX WITH SECOND ACFT ON APCH WHO RECEIVES TCASII ALERT.
Narrative: APCHING DTW WE WERE ASSIGNED A 090 DEG HDG, 210 KTS, AND DSND TO 3000 FT. APCH CTL FREQ VERY BUSY. WE WERE APPROX 15 DME OUT ON L BASE TO RWY 3L. AS WE BEGAN TO GET CLOSER TO 3L CTRLINE, BOTH CAPT AND FO QUESTIONED EACH OTHER AND BELIEVED WE HAD RECEIVED NO APCH CLRNC. WE SAW AN LGT AT OUR 2 O'CLOCK HIGH ON FINAL TO 3R. WE WERE UNABLE TO QUESTION APCH CTL DUE TO FREQ CONGESTION. I BEGAN SLOWING ACFT AND BEGAN A SLOW L TURN BACK TOWARD 3L CTRLINE. AT NO TIME DID WE FEEL WE WERE IN DANGER AND VISUALLY, EVERYTHING SEEMED SAFE. AT THIS TIME THE APCH CTLR ISSUED US AN APCH CLRNC. WE LANDED NORMALLY, AS DID THE LGT ON RWY 3R. APPARENTLY, LGT GOT A TCASII RA. WE WERE NOT TCASII EQUIPPED. I'D SAY THE TCASII WORKED AS DESIGNED. I DO NOT KNOW HOW CLOSE WE GOT TO THE LGT BUT NO GAR OR EVASIVE MANEUVERS WERE TAKEN BY EITHER 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.