At light transport cpr pilot complains that he had an near midair collision with an small aircraft.

Attributes
ACN	247478
Time
Date	199307
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : apa
State Reference	CO
Altitude	msl bound lower : 8000 msl bound upper : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : apa
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 90 flight time total : 8500 flight time type : 2400
ASRS Report	247478
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 800 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Under ATC control inside the den TCA we were vectored to a 180 degree heading approximately 13 northeast of the airport. A near miss occurred at 8000 ft. Approach did not call the traffic. It was a VFR high wing small aircraft inside the den TCA. Evasive action was a hard right turn from both aircraft. Upon landing, I contacted the TRACON manager and reported the incident. I asked to pull the tape and review the occurrence. He contacted me a few hours later and informed me that there was no target (primary or secondary) in my vicinity. I've concluded that this single engine small aircraft was illegally inside the den TCA without a working transponder.

Original NASA ASRS Text

Title: AT LTT CPR PLT COMPLAINS THAT HE HAD AN NMAC WITH AN SMA.

Narrative: UNDER ATC CTL INSIDE THE DEN TCA WE WERE VECTORED TO A 180 DEG HDG APPROX 13 NE OF THE ARPT. A NEAR MISS OCCURRED AT 8000 FT. APCH DID NOT CALL THE TFC. IT WAS A VFR HIGH WING SMA INSIDE THE DEN TCA. EVASIVE ACTION WAS A HARD R TURN FROM BOTH ACFT. UPON LNDG, I CONTACTED THE TRACON MGR AND RPTED THE INCIDENT. I ASKED TO PULL THE TAPE AND REVIEW THE OCCURRENCE. HE CONTACTED ME A FEW HRS LATER AND INFORMED ME THAT THERE WAS NO TARGET (PRIMARY OR SECONDARY) IN MY VICINITY. I'VE CONCLUDED THAT THIS SINGLE ENG SMA WAS ILLEGALLY INSIDE THE DEN TCA WITHOUT A WORKING XPONDER.

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.