GA pilot reported a problem with a new avionics platform that seemingly caused an airspace incursion...

Attributes
ACN	1465141
Time
Date	201707
Local Time Of Day	1201-1800
Place
Locale Reference	LVK.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Small Aircraft
Operating Under FAR Part	Part 91
Flight Phase	Descent
Flight Plan	None
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Instrument
Experience	Flight Crew Last 90 Days 30 Flight Crew Total 3300 Flight Crew Type 2000
Events
Anomaly	Aircraft Equipment Problem Less Severe Airspace Violation All Types Deviation - Procedural FAR Deviation - Procedural Published Material / Policy

Narrative:

New avionics (garmin 750) incorrectly showed boundaries of san francisco class B. I descended to 6000 foot to be below outer sector floor. By time I double checked (ipad) I was near the 4000 foot floor sector and descending rapidly. I may have been slightly above 4000 feet after entering the 4000 foot floor sector. When ATC advised me of the problem; I was already in a rapid descent.

Original NASA ASRS Text

Title: GA pilot reported a problem with a new avionics platform that seemingly caused an airspace incursion.

Narrative: New avionics (Garmin 750) incorrectly showed boundaries of San Francisco Class B. I descended to 6000 foot to be below outer sector floor. By time I double checked (iPad) I was near the 4000 foot floor sector and descending rapidly. I may have been slightly above 4000 feet after entering the 4000 foot floor sector. When ATC advised me of the problem; I was already in a rapid descent.

Data retrieved from NASA's ASRS site 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.