PA28 pilot and an air carrier A320 had conflict in D21 class east airspace.

Attributes
ACN	593118
Time
Date	200309
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : d21.tracon
State Reference	MI
Altitude	msl single value : 11500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : d21.tracon
Make Model Name	PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior
Navigation In Use	other
Flight Phase	cruise : level
Aircraft 2
Controlling Facilities	tracon : d21.tracon
Operator	common carrier : air carrier
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Person 1
Function	flight crew : single pilot
Qualification	pilot : multi engine pilot : instrument pilot : atp
Experience	flight time last 90 days : 250 flight time total : 17900 flight time type : 550
ASRS Report	593118
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne critical non adherence : published procedure
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action other
Miss Distance	horizontal : 2500 vertical : 300
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure

Narrative:

On a VFR flight from lansing (lan) to akron (akr), we climbed VFR to 11500 ft while talking to detroit approach. Traffic was never called to us. The airbus 320 was told of the traffic on another frequency. When I queried the controller, he casually mentioned the airbus was probably on a TCASII alert. No further problem occurred with flight.

Original NASA ASRS Text

Title: PA28 PLT AND AN ACR A320 HAD CONFLICT IN D21 CLASS E AIRSPACE.

Narrative: ON A VFR FLT FROM LANSING (LAN) TO AKRON (AKR), WE CLBED VFR TO 11500 FT WHILE TALKING TO DETROIT APCH. TFC WAS NEVER CALLED TO US. THE AIRBUS 320 WAS TOLD OF THE TFC ON ANOTHER FREQ. WHEN I QUERIED THE CTLR, HE CASUALLY MENTIONED THE AIRBUS WAS PROBABLY ON A TCASII ALERT. NO FURTHER PROB OCCURRED WITH FLT.

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.