Pilot of C182 may have entered enw class D en route to pwk.

Attributes
ACN	707193
Time
Date	200608
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : enw.airport
State Reference	WI
Altitude	msl single value : 2200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : enw.tower
Operator	general aviation : personal
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	cruise : level
Route In Use	enroute : direct
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Experience	flight time last 90 days : 50 flight time total : 500 flight time type : 150
ASRS Report	707193
Events
Anomaly	aircraft equipment problem : less severe airspace violation : entry non adherence : far
Independent Detector	other flight crewa
Resolutory Action	flight crew : exited penetrated airspace
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

I was crossing VFR from ues to pwk monitoring my position via a garmin 530 GPS that was properly installed and IFR certified. I put the GPS in obs mode and the screen must have froze. I was aware of how close I was to the enw class 'D' airspace and could see the airport. When I realized the moving map display was frozen; I selected the nearest airport function. It said that enw was 5.2 NM away; but by then I was past the tangent point of their airspace. I may have clipped the western edge of enw's airspace while the display was frozen. I was monitoring enw's tower frequency both before and after; but was getting pwk's ADIZ near the tangent point; where the violation may have occurred.

Original NASA ASRS Text

Title: PLT OF C182 MAY HAVE ENTERED ENW CLASS D ENRTE TO PWK.

Narrative: I WAS CROSSING VFR FROM UES TO PWK MONITORING MY POSITION VIA A GARMIN 530 GPS THAT WAS PROPERLY INSTALLED AND IFR CERTIFIED. I PUT THE GPS IN OBS MODE AND THE SCREEN MUST HAVE FROZE. I WAS AWARE OF HOW CLOSE I WAS TO THE ENW CLASS 'D' AIRSPACE AND COULD SEE THE ARPT. WHEN I REALIZED THE MOVING MAP DISPLAY WAS FROZEN; I SELECTED THE NEAREST ARPT FUNCTION. IT SAID THAT ENW WAS 5.2 NM AWAY; BUT BY THEN I WAS PAST THE TANGENT POINT OF THEIR AIRSPACE. I MAY HAVE CLIPPED THE WESTERN EDGE OF ENW'S AIRSPACE WHILE THE DISPLAY WAS FROZEN. I WAS MONITORING ENW'S TWR FREQ BOTH BEFORE AND AFTER; BUT WAS GETTING PWK'S ADIZ NEAR THE TANGENT POINT; WHERE THE VIOLATION MAY HAVE OCCURRED.

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.