Narrative:

Student pilot on first solo flight into practice area. While cruising at 5000 ft MSL, I inadvertently broke class B airspace for approximately 4 mi. I was within 1-2 mi of the outer 20 NM ring throughout. Upon awareness, I immediately descended to 2500 ft MSL and exited the class B airspace.

Google
 

Original NASA ASRS Text

Title: STUDENT PLT ON FIRST SOLO OUT OF LCL TFC PATTERN ACCIDENTALLY ENTERS CLASS B AIRSPACE AND CRUISES AT THE WRONG VFR ALT.

Narrative: STUDENT PLT ON FIRST SOLO FLT INTO PRACTICE AREA. WHILE CRUISING AT 5000 FT MSL, I INADVERTENTLY BROKE CLASS B AIRSPACE FOR APPROX 4 MI. I WAS WITHIN 1-2 MI OF THE OUTER 20 NM RING THROUGHOUT. UPON AWARENESS, I IMMEDIATELY DSNDED TO 2500 FT MSL AND EXITED THE CLASS B AIRSPACE.

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.