Narrative:

I was flying a PA60 VFR from teb to bdl. I maintained 1400 ft MSL to remain clear of new york's class B airspace. After passing the alpine tower (teb VOR/DME 053 degree radial, 9.0 DME) the floor of the class B airspace raises to 3000 ft MSL. After passing the alpine, I climbed to 2990 ft MSL to remain clear of new york's class B airspace and clear hpn's class D airspace. I told new york's approach controller (120.8) what I was doing and he gave me a squawk and requested my altitude. Not thinking before I spoke, I rounded my altitude to the nearest 100 ft (which most pilots do) and told him I was at 3000 ft. He asked me who cleared me into the class B airspace and I responded that I was not in the class B airspace. He said I most certainly was at 3000 ft. This is a nightly operation for our carrier and there seems to be some friction between this controller and our planes. I responded that according to my VFR chart, I was not in the class B airspace. I should have calmed down and responded that I was at 2990 ft MSL instead of 3000 ft MSL. The controller then provided me with flight following after hpn.

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Original NASA ASRS Text

Title: PA60 AIR TAXI CARGO FLT ON VFR FLT PLAN WAS FLYING 10 FT BELOW THE FLOOR OF THE CLASS B AIRSPACE. DEP CTL REQUESTED ALT AND RPTR STATED 3000 FT WHEN HE WAS ACTUALLY AT 2990 FT. FLOOR OF THE CLASS B AIRSPACE IS 3000 FT AND CTLR QUESTIONED WHO CLRED THE FLT INTO THE CLASS B AIRSPACE.

Narrative: I WAS FLYING A PA60 VFR FROM TEB TO BDL. I MAINTAINED 1400 FT MSL TO REMAIN CLR OF NEW YORK'S CLASS B AIRSPACE. AFTER PASSING THE ALPINE TWR (TEB VOR/DME 053 DEG RADIAL, 9.0 DME) THE FLOOR OF THE CLASS B AIRSPACE RAISES TO 3000 FT MSL. AFTER PASSING THE ALPINE, I CLBED TO 2990 FT MSL TO REMAIN CLR OF NEW YORK'S CLASS B AIRSPACE AND CLR HPN'S CLASS D AIRSPACE. I TOLD NEW YORK'S APCH CTLR (120.8) WHAT I WAS DOING AND HE GAVE ME A SQUAWK AND REQUESTED MY ALT. NOT THINKING BEFORE I SPOKE, I ROUNDED MY ALT TO THE NEAREST 100 FT (WHICH MOST PLTS DO) AND TOLD HIM I WAS AT 3000 FT. HE ASKED ME WHO CLRED ME INTO THE CLASS B AIRSPACE AND I RESPONDED THAT I WAS NOT IN THE CLASS B AIRSPACE. HE SAID I MOST CERTAINLY WAS AT 3000 FT. THIS IS A NIGHTLY OP FOR OUR CARRIER AND THERE SEEMS TO BE SOME FRICTION BTWN THIS CTLR AND OUR PLANES. I RESPONDED THAT ACCORDING TO MY VFR CHART, I WAS NOT IN THE CLASS B AIRSPACE. I SHOULD HAVE CALMED DOWN AND RESPONDED THAT I WAS AT 2990 FT MSL INSTEAD OF 3000 FT MSL. THE CTLR THEN PROVIDED ME WITH FLT FOLLOWING AFTER HPN.

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.