Atx cargo aircraft making a downwind departure climbs into sfo class B without clearance. Pilot cannot be sure of his position when climbing eastbound.

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Attributes
ACN	443620
Time
Date	199907
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : sfo.vor
State Reference	CA
Altitude	msl single value : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : o90.tracon
Operator	common carrier : air taxi
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 135
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Route In Use	departure other
Flight Plan	None
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument
Experience	flight time total : 1500
ASRS Report	443620
Events
Anomaly	airspace violation : entry non adherence : clearance non adherence : far non adherence : published procedure
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : exited penetrated airspace
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Departing from oakland, I followed instruction from ATC to avoid traffic -- heading 080 degrees, climb 4500 ft. I am not sure that I was cleared to class B sfo, when I realized, in my climb, that I could have been in class B, by checking my altitude and DME. I was at 17 DME, but above 3000 ft. Since traffic was busy, instructions were confusing and I wasn't sure of my position.

Original NASA ASRS Text

Title: ATX CARGO ACFT MAKING A DOWNWIND DEP CLBS INTO SFO CLASS B WITHOUT CLRNC. PLT CANNOT BE SURE OF HIS POS WHEN CLBING EBOUND.

Narrative: DEPARTING FROM OAKLAND, I FOLLOWED INSTRUCTION FROM ATC TO AVOID TFC -- HDG 080 DEGS, CLB 4500 FT. I AM NOT SURE THAT I WAS CLRED TO CLASS B SFO, WHEN I REALIZED, IN MY CLB, THAT I COULD HAVE BEEN IN CLASS B, BY CHKING MY ALT AND DME. I WAS AT 17 DME, BUT ABOVE 3000 FT. SINCE TFC WAS BUSY, INSTRUCTIONS WERE CONFUSING AND I WASN'T SURE OF MY POS.

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.