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A BE35 pilot at 8000 ft has an aircraft fly under him on the airway, just 500 ft lower, going the other way. ATC had not called traffic until it was past his aircraft.
| Attributes | |
| ACN | 396165 |
| Time | |
| Date | 199803 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : dlh |
| State Reference | MN |
| Altitude | msl bound lower : 8000 msl bound upper : 8000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zmp |
| Operator | general aviation : personal |
| Make Model Name | Bonanza 35 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Route In Use | enroute airway : zmp |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : private |
| Experience | flight time last 90 days : 4 flight time total : 894 flight time type : 335 |
| ASRS Report | 396165 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Events | |
| Anomaly | conflict : airborne less severe |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
I was cruising on IFR flight plan, RNAV direct to rst. I had departed dlh approximately 25 mins earlier at XA30 pm ct. I was in radar contact with ZMP at 8000 ft MSL. There was a broken deck of clouds below with tops estimated at 4000- 4500 ft MSL. Visibility at my altitude appeared to be 10+ mi. Suddenly I saw something flash by directly below me. I wasn't sure what it was until ATC called immediately after I saw this object to report I had opposite direction traffic 1 mi ahead of me at 7500 ft MSL. I reported that it probably had just passed beneath me. Potentially with tolerances associated with mode C altitudes and altimeters this could have been a serious incident. I would have appreciated earlier warning of the approaching traffic by ATC.
Original NASA ASRS Text
Title: A BE35 PLT AT 8000 FT HAS AN ACFT FLY UNDER HIM ON THE AIRWAY, JUST 500 FT LOWER, GOING THE OTHER WAY. ATC HAD NOT CALLED TFC UNTIL IT WAS PAST HIS ACFT.
Narrative: I WAS CRUISING ON IFR FLT PLAN, RNAV DIRECT TO RST. I HAD DEPARTED DLH APPROX 25 MINS EARLIER AT XA30 PM CT. I WAS IN RADAR CONTACT WITH ZMP AT 8000 FT MSL. THERE WAS A BROKEN DECK OF CLOUDS BELOW WITH TOPS ESTIMATED AT 4000- 4500 FT MSL. VISIBILITY AT MY ALT APPEARED TO BE 10+ MI. SUDDENLY I SAW SOMETHING FLASH BY DIRECTLY BELOW ME. I WASN'T SURE WHAT IT WAS UNTIL ATC CALLED IMMEDIATELY AFTER I SAW THIS OBJECT TO RPT I HAD OPPOSITE DIRECTION TFC 1 MI AHEAD OF ME AT 7500 FT MSL. I RPTED THAT IT PROBABLY HAD JUST PASSED BENEATH ME. POTENTIALLY WITH TOLERANCES ASSOCIATED WITH MODE C ALTS AND ALTIMETERS THIS COULD HAVE BEEN A SERIOUS INCIDENT. I WOULD HAVE APPRECIATED EARLIER WARNING OF THE APCHING TFC BY ATC.
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.