Small aircraft at cruise altitude has near midair collision with small aircraft.

Attributes
ACN	148180
Time
Date	199006
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : cos
State Reference	CO
Altitude	msl bound lower : 8500 msl bound upper : 8500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cos
Operator	common carrier : air taxi
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	VFR
Aircraft 2
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 19 flight time total : 20000
ASRS Report	148180
Person 2
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 350
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Cruising at 8500' MSL a high-wing, single engine aircraft crossed in front from left to right. This aircraft was at the same altitude approximately as my aircraft and took no evasive action. Radar flight following would likely prevent a recurrence.

Original NASA ASRS Text

Title: SMA AT CRUISE ALT HAS NMAC WITH SMA.

Narrative: CRUISING AT 8500' MSL A HIGH-WING, SINGLE ENG ACFT CROSSED IN FRONT FROM LEFT TO RIGHT. THIS ACFT WAS AT THE SAME ALT APPROX AS MY ACFT AND TOOK NO EVASIVE ACTION. RADAR FLT FOLLOWING WOULD LIKELY PREVENT A RECURRENCE.

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.