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Close proximity GA small aircraft unknown mode 'C' aircraft. ARTCC radar controller reported GA missed unknown by 100' but no one in small aircraft saw the traffic.
| Attributes | |
| ACN | 93885 |
| Time | |
| Date | 198809 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : osw airport : bvo |
| State Reference | KS |
| Altitude | msl bound lower : 3000 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | cruise other descent other |
| Route In Use | enroute airway : v190 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 150 flight time total : 24000 flight time type : 4000 |
| ASRS Report | 93885 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : private |
| Experience | flight time total : 2500 flight time type : 500 |
| Events | |
| Anomaly | conflict : nmac |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Miss Distance | unspecified : 100 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
En route IFR from rfd-bvo. Center descent from 4000 to 2700'. At 3000 MSL center advised we had passed within 100' of a mode C aircraft. 4 people in our airplane looking, no sighting. We cancelled IFR shortly after. Over the osw VOR, center changed frequencys. We were unable to make contact with other center. Probably too low, heard other aircraft, but no center. Returned to original 128.6. Cancelled IFR. Callback conversation with reporter revealed following information. The reporter was operating as first officer working the radio for a private pilot with an instrument rating. Reporter said they were not communicating with ARTCC for about 10 min prior to the incident. Sun was not a problem under an overcast but no one on board saw the other aircraft.
Original NASA ASRS Text
Title: CLOSE PROX GA SMA UNKNOWN MODE 'C' ACFT. ARTCC RADAR CTLR REPORTED GA MISSED UNKNOWN BY 100' BUT NO ONE IN SMA SAW THE TRAFFIC.
Narrative: ENRTE IFR FROM RFD-BVO. CTR DSCNT FROM 4000 TO 2700'. AT 3000 MSL CTR ADVISED WE HAD PASSED WITHIN 100' OF A MODE C ACFT. 4 PEOPLE IN OUR AIRPLANE LOOKING, NO SIGHTING. WE CANCELLED IFR SHORTLY AFTER. OVER THE OSW VOR, CTR CHANGED FREQS. WE WERE UNABLE TO MAKE CONTACT WITH OTHER CTR. PROBABLY TOO LOW, HEARD OTHER ACFT, BUT NO CTR. RETURNED TO ORIGINAL 128.6. CANCELLED IFR. CALLBACK CONVERSATION WITH RPTR REVEALED FOLLOWING INFO. THE RPTR WAS OPERATING AS F/O WORKING THE RADIO FOR A PVT PLT WITH AN INSTR RATING. RPTR SAID THEY WERE NOT COMMUNICATING WITH ARTCC FOR ABOUT 10 MIN PRIOR TO THE INCIDENT. SUN WAS NOT A PROB UNDER AN OVERCAST BUT NO ONE ON BOARD SAW THE OTHER ACFT.
Data retrieved from NASA's ASRS site as of August 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.