C182 pilot has an near midair collision during cruise.

Attributes
ACN	721536
Time
Date	200612
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bna.airport
State Reference	TN
Altitude	msl single value : 4500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : bna.tracon
Operator	other
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Route In Use	enroute : on vectors
Aircraft 2
Controlling Facilities	tracon : bna.tracon
Make Model Name	Small Aircraft Low Wing 1 Eng Retractable Gear
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Person 1
Affiliation	company : air carrier government other
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp pilot : multi engine pilot : instrument
Experience	flight time last 90 days : 40 flight time total : 3400 flight time type : 160
ASRS Report	721536
Person 2
Affiliation	government other
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	controller : issued advisory flight crew : took precautionary avoidance action
Miss Distance	horizontal : 0 vertical : 100
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance
Primary Problem	Airspace Structure

Narrative:

Nashville approach advised that we had traffic at 12:30 O'clock position; indicating 4400 ft. We were at 4500 ft heading north and scanning for the traffic. We observed the other aircraft coming in from about the 1:30 O'clock position or 2 O'clock position and slightly below us. As aircraft commander; I initiated an immediate climb and the other aircraft passed about 100 ft below us. Although the other aircraft was a low wing aircraft (possibly a piper cherokee or mooney) and we were in a high wing aircraft (cessna 182); the other aircraft gave no indication that he had seen us.

Original NASA ASRS Text

Title: C182 PLT HAS AN NMAC DURING CRUISE.

Narrative: NASHVILLE APCH ADVISED THAT WE HAD TFC AT 12:30 O'CLOCK POS; INDICATING 4400 FT. WE WERE AT 4500 FT HDG N AND SCANNING FOR THE TFC. WE OBSERVED THE OTHER ACFT COMING IN FROM ABOUT THE 1:30 O'CLOCK POS OR 2 O'CLOCK POS AND SLIGHTLY BELOW US. AS ACFT COMMANDER; I INITIATED AN IMMEDIATE CLB AND THE OTHER ACFT PASSED ABOUT 100 FT BELOW US. ALTHOUGH THE OTHER ACFT WAS A LOW WING ACFT (POSSIBLY A PIPER CHEROKEE OR MOONEY) AND WE WERE IN A HIGH WING ACFT (CESSNA 182); THE OTHER ACFT GAVE NO INDICATION THAT HE HAD SEEN US.

Data retrieved from NASA's ASRS site as of January 2009 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.