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A B727-200 captain on approach to mdw was avoiding traffic below that had been pointed out by ATC, when a cessna suddenly appeared on the TCASII display from above, causing an near midair collision.
| Attributes | |
| ACN | 452453 |
| Time | |
| Date | 199910 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : mdw.airport |
| State Reference | IL |
| Altitude | msl bound lower : 2800 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : c90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer only : 31c |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : c90.tracon |
| Operator | general aviation : personal |
| Make Model Name | Cessna 210 Centurion / Turbo Centurion 210C, 210D |
| Operating Under FAR Part | Part 91 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : private pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 120 flight time total : 8700 flight time type : 2000 |
| ASRS Report | 452453 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : multi engine pilot : instrument |
| Events | |
| Anomaly | conflict : nmac conflict : airborne critical non adherence : required legal separation |
| Independent Detector | aircraft equipment : tcas other flight crewa other flight crewb other other : 3 |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 200 vertical : 0 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
While on course centerline for approach, we were 'cleared for approach' and at 4000 ft approach control advised of conflicting traffic low, and that we could climb a little if we wanted to. Just a second or 2 later, additional traffic came on the TCASII screen from the right. Approach control did not advise us of this co-altitude ('00' on icon) traffic whose TCASII return quickly turned from yellow to red (TA to RA). The vsi advisory was to descend at a rate approximately -1500 FPM nose down. The advisory was complied with, and the cessna passed over top of our aircraft exactly at 1200 ft high. The miss distance was very close, possibly in the neighborhood of 200-300 ft. After the conflict was resolved, we climbed back up to recapture glide path and continued to a normal approach and landing at mdw. Approach control was notified of the presence of the other aircraft.
Original NASA ASRS Text
Title: A B727-200 CAPT ON APCH TO MDW WAS AVOIDING TFC BELOW THAT HAD BEEN POINTED OUT BY ATC, WHEN A CESSNA SUDDENLY APPEARED ON THE TCASII DISPLAY FROM ABOVE, CAUSING AN NMAC.
Narrative: WHILE ON COURSE CTRLINE FOR APCH, WE WERE 'CLRED FOR APCH' AND AT 4000 FT APCH CTL ADVISED OF CONFLICTING TFC LOW, AND THAT WE COULD CLB A LITTLE IF WE WANTED TO. JUST A SECOND OR 2 LATER, ADDITIONAL TFC CAME ON THE TCASII SCREEN FROM THE R. APCH CTL DID NOT ADVISE US OF THIS CO-ALT ('00' ON ICON) TFC WHOSE TCASII RETURN QUICKLY TURNED FROM YELLOW TO RED (TA TO RA). THE VSI ADVISORY WAS TO DSND AT A RATE APPROX -1500 FPM NOSE DOWN. THE ADVISORY WAS COMPLIED WITH, AND THE CESSNA PASSED OVER TOP OF OUR ACFT EXACTLY AT 1200 FT HIGH. THE MISS DISTANCE WAS VERY CLOSE, POSSIBLY IN THE NEIGHBORHOOD OF 200-300 FT. AFTER THE CONFLICT WAS RESOLVED, WE CLBED BACK UP TO RECAPTURE GLIDE PATH AND CONTINUED TO A NORMAL APCH AND LNDG AT MDW. APCH CTL WAS NOTIFIED OF THE PRESENCE OF THE OTHER 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.