PA28 departing bay area entered sfo class B to avoid air carrier landing oak.

Attributes
ACN	588850
Time
Date	200307
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : nct.tracon
State Reference	CA
Altitude	msl bound lower : 3800 msl bound upper : 4100
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : nct.tracon
Operator	general aviation : personal
Make Model Name	PA-28 Cherokee Arrow IV
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	VFR
Aircraft 2
Controlling Facilities	tracon : nct.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude descent : approach
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot oversight : pic
Qualification	pilot : private
Experience	flight time last 90 days : 12.3 flight time total : 360 flight time type : 168
ASRS Report	588850
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	airspace violation : entry conflict : airborne less severe non adherence : far non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	flight crew : exited penetrated airspace flight crew : took evasive action
Miss Distance	vertical : 1000
Supplementary
Problem Areas	Flight Crew Human Performance Airspace Structure
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was in level cruise at 3800 ft MSL, going nne, near niles canyon. I was thus 200 ft below the floor of the sfo class B. I spotted an air carrier X jet descending out of class B, (probably) on approach to oak. The jet's track was in a southwesterly direction. I felt that the jet was going to pass beneath and quite close to my flight path. I therefore initiated a climb to increase our separation. The climb caused my aircraft to enter class B airspace momentarily. I arrested the climb at 4100 ft MSL and descended out of class B. I could have avoided the problem altogether by flying nne across the sunol gap rather than near niles canyon. This would have given me a much larger margin of separation from jets on approach to oak from the east.

Original NASA ASRS Text

Title: PA28 DEPARTING BAY AREA ENTERED SFO CLASS B TO AVOID ACR LNDG OAK.

Narrative: I WAS IN LEVEL CRUISE AT 3800 FT MSL, GOING NNE, NEAR NILES CANYON. I WAS THUS 200 FT BELOW THE FLOOR OF THE SFO CLASS B. I SPOTTED AN ACR X JET DSNDING OUT OF CLASS B, (PROBABLY) ON APCH TO OAK. THE JET'S TRACK WAS IN A SOUTHWESTERLY DIRECTION. I FELT THAT THE JET WAS GOING TO PASS BENEATH AND QUITE CLOSE TO MY FLT PATH. I THEREFORE INITIATED A CLB TO INCREASE OUR SEPARATION. THE CLB CAUSED MY ACFT TO ENTER CLASS B AIRSPACE MOMENTARILY. I ARRESTED THE CLB AT 4100 FT MSL AND DSNDED OUT OF CLASS B. I COULD HAVE AVOIDED THE PROB ALTOGETHER BY FLYING NNE ACROSS THE SUNOL GAP RATHER THAN NEAR NILES CANYON. THIS WOULD HAVE GIVEN ME A MUCH LARGER MARGIN OF SEPARATION FROM JETS ON APCH TO OAK FROM THE E.

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.