A pilot departed sql west bound; climbed to 3;700 feet and there took evasive action from gtn 750/65...

Narrative:

I took off from san carlos airport; bay meadows departure. Normal climb out to the pacific coast; and I had just leveled off at 3;700 to stay under the san francisco class B airspace that starts at 4;000 feet in that area. No sooner than I was level; both my garmin gtn 750; and garmin 650 (both driven by a garmin gdl 88 tis B for traffic) lit up for a traffic conflict. I switched the gtn 650 to the 2 mile ring display; and saw that another aircraft was in direct conflict with my airplane. That aircraft was moving very fast relative to me; and if I did not take some evasive action; it was absolutely apparent that a mid-air was probable. That aircraft display was showing him to be 100 to 200 feet below me. The convergence was so fast that I had very little time to fully analyze the complete picture; but I needed to make a change in altitude and direction now. I immediately went to full throttle and climbed at my maximum rate of climb until I could see from the traffic displays that he had passed virtually directly under me; at a separation of about 400 to 500 feet. For the moment I kept climbing until I was absolutely sure that he had passed under me. I never did see that aircraft visually. In the process of evading the threat; I had climbed to 4;100 feet; or 100 feet into the sfo class B airspace. I immediately descended back down to my previous 3;700 foot altitude. I regard my (minor) intrusion into the class B airspace as necessary for safety. I am convinced that had I not climbed away from the converging aircraft; a midair was all too likely. I am also glad that I spent a very considerable amount of money rebuilding my avionics to include the gtn 750/gtn 650/gdl 88 equipment. The traffic warnings alone are worth the price. In the last several months; I have 'seen' traffic via the avionics that I have not seen at all; or only when very close via 'eyeballs'.

Original NASA ASRS Text

Title: A pilot departed SQL West bound; climbed to 3;700 feet and there took evasive action from GTN 750/650 TIS alerted traffic 400 feet below. During the climb he momentarily entered SFO Class B.

Narrative: I took off from San Carlos Airport; Bay Meadows departure. Normal climb out to the Pacific Coast; and I had just leveled off at 3;700 to stay under the San Francisco Class B airspace that starts at 4;000 feet in that area. No sooner than I was level; both my Garmin GTN 750; and Garmin 650 (both driven by a Garmin GDL 88 TIS B for Traffic) lit up for a traffic conflict. I switched the GTN 650 to the 2 mile ring display; and saw that another aircraft was in direct conflict with my airplane. That aircraft was moving very fast relative to me; and if I did not take some evasive action; it was absolutely apparent that a mid-air was probable. That aircraft display was showing him to be 100 to 200 feet below me. The convergence was so fast that I had very little time to fully analyze the complete picture; but I needed to make a change in altitude and direction NOW. I immediately went to full throttle and climbed at my maximum rate of climb until I could see from the traffic displays that he had passed virtually directly under me; at a separation of about 400 to 500 feet. For the moment I kept climbing until I was absolutely sure that he had passed under me. I never did see that aircraft visually. In the process of evading the threat; I had climbed to 4;100 feet; or 100 feet into the SFO Class B airspace. I immediately descended back down to my previous 3;700 foot altitude. I regard my (minor) intrusion into the Class B airspace as necessary for safety. I am convinced that had I not climbed away from the converging aircraft; a midair was all too likely. I am also glad that I spent a very considerable amount of money rebuilding my avionics to include the GTN 750/GTN 650/GDL 88 equipment. The traffic warnings alone are worth the price. In the last several months; I have 'seen' traffic via the avionics that I have not seen at all; or only when very close via 'eyeballs'.

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.

Attributes
ACN	1203554
Time
Date	201409
Local Time Of Day	0601-1200
Place
Locale Reference	NCT.TRACON
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Small Aircraft Low Wing 1 Eng Retractable Gear
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb
Route In Use	Direct
Flight Plan	None
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Commercial Flight Crew Instrument
Experience	Flight Crew Last 90 Days 18 Flight Crew Total 2750 Flight Crew Type 2000
Events
Anomaly	Airspace Violation All Types Conflict NMAC Deviation - Altitude Overshoot
Miss Distance	Horizontal 100 Vertical 400

A pilot departed sql west bound; climbed to 3;700 feet and there took evasive action from gtn 750/650 tis alerted traffic 400 feet below. During the climb he momentarily entered sfo class B.