A VFR europa and a beech baron had a near miss as the europa descended through 2700 ft on the edge o...

Attributes
ACN	821827
Time
Date	200901
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Small Aircraft
Operating Under FAR Part	Part 91
Flight Phase	Descent
Flight Plan	None
Aircraft 2
Make Model Name	Beechcraft Twin Piston Undifferentiated or Other Model
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Flight Instructor Flight Crew Commercial Flight Crew Instrument
Experience	Flight Crew Last 90 Days 35 Flight Crew Total 6000 Flight Crew Type 300
Person 2
Function	Local
Events
Anomaly	Airspace Violation All Types Conflict NMAC Deviation - Altitude Crossing Restriction Not Met Deviation - Procedural FAR Deviation - Procedural Published Material / Policy
Miss Distance	Horizontal 0 Vertical 200

Narrative:

On a cavu afternoon while returning to my home field; I passed several hundred ft above the 3;000 ft top of ZZZ class D airspace and commenced a gradual descent; planning to just clear the class D as I passed its northeast edge. In the vicinity of the airspace boundary I was surprised by a twin baron at 10 o'clock position about a half mile and slightly below me but approaching head-on. I stopped my descent and the baron passed below me about 100-200 ft. Upon landing at my home field; I was directed to call ZZZ tower. ZZZ ATCT stated that it appeared that I had clipped the top of their class D while they had traffic passing through their airspace just 2 miles north at 2;600 ft. ZZZ had been receiving my mode C intermittently so they were not sure of my altitude. Lesson learned: particularly in metropolitan airspace; don't fly close outside the edge of class bcd airspace because that is where aircraft avoiding entry often fly. Or perhaps the better course of action would be to fly through the airspace (with clearance) and with controller communications.

Original NASA ASRS Text

Title: A VFR Europa and a Beech Baron had a near miss as the Europa descended through 2700 FT on the edge of Class D to its home field and the Beech was passing through the adjacent Class D at 2600 FT.

Narrative: On a CAVU afternoon while returning to my home field; I passed several hundred FT above the 3;000 FT top of ZZZ Class D airspace and commenced a gradual descent; planning to just clear the Class D as I passed its northeast edge. In the vicinity of the airspace boundary I was surprised by a twin Baron at 10 o'clock position about a half mile and slightly below me but approaching head-on. I stopped my descent and the Baron passed below me about 100-200 FT. Upon landing at my home field; I was directed to call ZZZ Tower. ZZZ ATCT stated that it appeared that I had clipped the top of their Class D while they had traffic passing through their airspace just 2 miles north at 2;600 FT. ZZZ had been receiving my Mode C intermittently so they were not sure of my altitude. Lesson learned: Particularly in metropolitan airspace; don't fly close outside the edge of Class BCD airspace because that is where aircraft avoiding entry often fly. Or perhaps the better course of action would be to fly through the airspace (with clearance) and with Controller communications.

Data retrieved from NASA's ASRS site as of April 2012 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.

A VFR europa and a beech baron had a near miss as the europa descended through 2700 ft on the edge of class D to its home field and the beech was passing through the adjacent class D at 2600 ft.