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Near midair collision between a no transponder C172 and a descending A300 approaching mdsd, first officer.
| Attributes | |
| ACN | 541282 |
| Time | |
| Date | 200203 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : mdsd.airport |
| State Reference | FO |
| Altitude | msl bound lower : 3000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | A300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 17 other |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 541282 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | altitude deviation : undershoot conflict : nmac non adherence : clearance non adherence : required legal separation other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Consequence | faa : reviewed incident with flight crew other |
| Miss Distance | horizontal : 0 vertical : 500 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance Aircraft |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Descending into sdq, I was given 3000 ft, but elected to stay at 4000 ft because MSA is 4000 ft. Good move because VFR cessna with no transponder crossed under our nose about 500 ft below us. Sdq did not advise primary target. We queried ATC, but got no answer. Could have been very, very ugly.
Original NASA ASRS Text
Title: NMAC BTWN A NO XPONDER C172 AND A DSNDING A300 APCHING MDSD, FO.
Narrative: DSNDING INTO SDQ, I WAS GIVEN 3000 FT, BUT ELECTED TO STAY AT 4000 FT BECAUSE MSA IS 4000 FT. GOOD MOVE BECAUSE VFR CESSNA WITH NO XPONDER CROSSED UNDER OUR NOSE ABOUT 500 FT BELOW US. SDQ DID NOT ADVISE PRIMARY TARGET. WE QUERIED ATC, BUT GOT NO ANSWER. COULD HAVE BEEN VERY, VERY UGLY.
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.