Pilot of a C320 inadvertently entered class B airspace when descending to land after canceling his I...

Attributes
ACN	481850
Time
Date	200008
Day	Sat
Local Time Of Day	0601 To 1200
Place
State Reference	TX
Altitude	msl bound lower : 3000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : d10.tracon tower : ict.tower
Operator	general aviation : personal
Make Model Name	Skynight 320
Operating Under FAR Part	Part 91
Flight Phase	descent : vacating altitude
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : multi engine pilot : instrument pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 140 flight time total : 4500 flight time type : 100
ASRS Report	481850
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	airspace violation : entry non adherence : far
Independent Detector	other controllera
Resolutory Action	controller : issued alert flight crew : exited penetrated airspace
Consequence	Other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

At 42 DME north of ranger VORTAC at 10000 ft on IFR flight plan, I canceled IFR and commanded a VFR descent. At 35 DME, was told to turn left to a heading of 280 degrees, as the controller stated I had entered class B airspace. At cancellation of my IFR and commencing VFR descent, I was told to remain clear of class B airspace. I was on a 210 degree heading to T67 (hicks field near afw) and descending to 3000 ft MSL. At the time of the controller call, I was at 5000 ft MSL and descending at 1500 FPM with 2 mins to go to class B airspace south of ranger, tx, on the chart). I complied with the instructions and didn't query the controller, as his workload at that moment was very high. Within 1 min, I was told by the controller I was clear of class B airspace and could proceed on course. I proceeded to my destination at 2500 ft MSL VFR and landed uneventfully. From my perspective, charts and avionics, I remained clear of class B airspace. If I did encroach the airspace it was by a matter of a few hundred ft and within 1 mi. I was using a dfw sectional class B chart that was current.

Original NASA ASRS Text

Title: PLT OF A C320 INADVERTENTLY ENTERED CLASS B AIRSPACE WHEN DSNDING TO LAND AFTER CANCELING HIS IFR FLT PLAN.

Narrative: AT 42 DME N OF RANGER VORTAC AT 10000 FT ON IFR FLT PLAN, I CANCELED IFR AND COMMANDED A VFR DSCNT. AT 35 DME, WAS TOLD TO TURN L TO A HDG OF 280 DEGS, AS THE CTLR STATED I HAD ENTERED CLASS B AIRSPACE. AT CANCELLATION OF MY IFR AND COMMENCING VFR DSCNT, I WAS TOLD TO REMAIN CLR OF CLASS B AIRSPACE. I WAS ON A 210 DEG HDG TO T67 (HICKS FIELD NEAR AFW) AND DSNDING TO 3000 FT MSL. AT THE TIME OF THE CTLR CALL, I WAS AT 5000 FT MSL AND DSNDING AT 1500 FPM WITH 2 MINS TO GO TO CLASS B AIRSPACE S OF RANGER, TX, ON THE CHART). I COMPLIED WITH THE INSTRUCTIONS AND DIDN'T QUERY THE CTLR, AS HIS WORKLOAD AT THAT MOMENT WAS VERY HIGH. WITHIN 1 MIN, I WAS TOLD BY THE CTLR I WAS CLR OF CLASS B AIRSPACE AND COULD PROCEED ON COURSE. I PROCEEDED TO MY DEST AT 2500 FT MSL VFR AND LANDED UNEVENTFULLY. FROM MY PERSPECTIVE, CHARTS AND AVIONICS, I REMAINED CLR OF CLASS B AIRSPACE. IF I DID ENCROACH THE AIRSPACE IT WAS BY A MATTER OF A FEW HUNDRED FT AND WITHIN 1 MI. I WAS USING A DFW SECTIONAL CLASS B CHART THAT WAS CURRENT.

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.

Pilot of a C320 inadvertently entered class B airspace when descending to land after canceling his IFR flight plan.