Close proximity GA-small aircraft commuter-light transport south of okc.

Attributes
ACN	141817
Time
Date	199004
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : oun
State Reference	OK
Altitude	msl bound lower : 4500 msl bound upper : 4700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : oun
Operator	general aviation : instructional
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 30 flight time total : 81 flight time type : 22
ASRS Report	141817
Person 2
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Events
Anomaly	conflict : nmac
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 500 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

I was traveling eastbound at approximately 4500' MSL in small aircraft X. I was 7 NM south of oun when the aircraft passed above and behind me. I did not know the aircraft ever passed me. I was told after I landed to contact okc approach; I had no idea why. Okc approach told me what had happened. Small aircraft Y also witnessed the event and told me about it when I was on the ground. Since I did not see the plane (light transport) because it was above and behind me, I took no corrective measures.

Original NASA ASRS Text

Title: CLOSE PROX GA-SMA COMMUTER-LTT SOUTH OF OKC.

Narrative: I WAS TRAVELING EBND AT APPROX 4500' MSL IN SMA X. I WAS 7 NM S OF OUN WHEN THE ACFT PASSED ABOVE AND BEHIND ME. I DID NOT KNOW THE ACFT EVER PASSED ME. I WAS TOLD AFTER I LANDED TO CONTACT OKC APCH; I HAD NO IDEA WHY. OKC APCH TOLD ME WHAT HAD HAPPENED. SMA Y ALSO WITNESSED THE EVENT AND TOLD ME ABOUT IT WHEN I WAS ON THE GND. SINCE I DID NOT SEE THE PLANE (LTT) BECAUSE IT WAS ABOVE AND BEHIND ME, I TOOK NO CORRECTIVE MEASURES.

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.