Pilot of small aircraft twin makes unauthorized entry into class D airspace. No contact with ATC.

Attributes
ACN	371070
Time
Date	199706
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : afw
State Reference	TX
Altitude	msl bound lower : 2800 msl bound upper : 2800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : afw tower : cle
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : cfi
Experience	flight time last 90 days : 60 flight time total : 6500 flight time type : 29
ASRS Report	371070
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	non adherence : far other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was flying VFR from ardmore, ok, to ft worth meacham using flight following with dfw approach. They told me if I was above 2600 ft MSL, no need to call alliance tower and below 3000 ft to be below class B airspace. 2 days later I did the same thing but was not using flight following. I landed at meacham and the tower advised I had entered alliance class D airspace. I was relying on past experience (2 days ago). I should have contacted alliance tower for clarification and then this would not have occurred.

Original NASA ASRS Text

Title: PLT OF SMA TWIN MAKES UNAUTH ENTRY INTO CLASS D AIRSPACE. NO CONTACT WITH ATC.

Narrative: I WAS FLYING VFR FROM ARDMORE, OK, TO FT WORTH MEACHAM USING FLT FOLLOWING WITH DFW APCH. THEY TOLD ME IF I WAS ABOVE 2600 FT MSL, NO NEED TO CALL ALLIANCE TWR AND BELOW 3000 FT TO BE BELOW CLASS B AIRSPACE. 2 DAYS LATER I DID THE SAME THING BUT WAS NOT USING FLT FOLLOWING. I LANDED AT MEACHAM AND THE TWR ADVISED I HAD ENTERED ALLIANCE CLASS D AIRSPACE. I WAS RELYING ON PAST EXPERIENCE (2 DAYS AGO). I SHOULD HAVE CONTACTED ALLIANCE TWR FOR CLARIFICATION AND THEN THIS WOULD NOT HAVE OCCURRED.

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.