Narrative:

Departed eqy airport en route to southwest, crossed NC18 and lkr airports swbound. Crossed NC18 at approximately 2600 ft MSL in level flight. Charlotte class B floor in this area is 3600 ft MSL. Shortly after crossing NC18, began climb, upon crossing lkr, altitude was approximately 4000 ft MSL. Climb leveled off at 6500 ft MSL southwest of lkr for VFR cruise, possible class B violation occurred as I climbed between NC18 and lkr. The class B area ends approximately 5 NM southwest of NC18, after a brief segment of airspace where the floor rises to 6000 ft MSL. There is a possibility that when I climbed between lkr and NC18, I may have 'knicked' the extreme edge of the class B when I climbed through 3600 ft MSL. I could have been in the class B without clearance for 1-3 mi before going into the section of airspace where class B rises to 6000 ft MSL. I should have delayed starting my climb from 2600 ft MSL until a point closer to lkr and there would be no question about whether I had or had not committed a deviation. I fly the area frequently and know better. I took for granted that I know the class B limits by memory, and I should have been constantly consulting my chart and xchking my position. A lesson learned is that even in a familiar area, you must be diligent and take nothing for granted.

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Original NASA ASRS Text

Title: PVT PLT OF AN SMA MAY HAVE INADVERTENTLY PENETRATED CLASS B AIRSPACE DURING CLBOUT.

Narrative: DEPARTED EQY ARPT ENRTE TO SW, CROSSED NC18 AND LKR ARPTS SWBOUND. CROSSED NC18 AT APPROX 2600 FT MSL IN LEVEL FLT. CHARLOTTE CLASS B FLOOR IN THIS AREA IS 3600 FT MSL. SHORTLY AFTER XING NC18, BEGAN CLB, UPON XING LKR, ALT WAS APPROX 4000 FT MSL. CLB LEVELED OFF AT 6500 FT MSL SW OF LKR FOR VFR CRUISE, POSSIBLE CLASS B VIOLATION OCCURRED AS I CLBED BTWN NC18 AND LKR. THE CLASS B AREA ENDS APPROX 5 NM SW OF NC18, AFTER A BRIEF SEGMENT OF AIRSPACE WHERE THE FLOOR RISES TO 6000 FT MSL. THERE IS A POSSIBILITY THAT WHEN I CLBED BTWN LKR AND NC18, I MAY HAVE 'KNICKED' THE EXTREME EDGE OF THE CLASS B WHEN I CLBED THROUGH 3600 FT MSL. I COULD HAVE BEEN IN THE CLASS B WITHOUT CLRNC FOR 1-3 MI BEFORE GOING INTO THE SECTION OF AIRSPACE WHERE CLASS B RISES TO 6000 FT MSL. I SHOULD HAVE DELAYED STARTING MY CLB FROM 2600 FT MSL UNTIL A POINT CLOSER TO LKR AND THERE WOULD BE NO QUESTION ABOUT WHETHER I HAD OR HAD NOT COMMITTED A DEV. I FLY THE AREA FREQUENTLY AND KNOW BETTER. I TOOK FOR GRANTED THAT I KNOW THE CLASS B LIMITS BY MEMORY, AND I SHOULD HAVE BEEN CONSTANTLY CONSULTING MY CHART AND XCHKING MY POS. A LESSON LEARNED IS THAT EVEN IN A FAMILIAR AREA, YOU MUST BE DILIGENT AND TAKE NOTHING FOR GRANTED.

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.