Flight Crew Air Transport Pilot (ATP)
Deviation - Speed All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural FAR
Flight Crew Became Reoriented
Airspace Structure; Procedure; Human Factors; Chart Or Publication
Accelerated to 250 knots while climbing on the TECKY3 departure out of San Jose while in the Class C airspace but believe we went below the Class B shelf. First Officer was Pilot Flying and as Pilot Monitoring I hesitated momentarily before telling the First Officer to slow down while I checked our position in Jeppesen charts. As we were slowing back to 200 knots we entered the Class B airspace from below. No comments from ATC and continued on our way. Began accelerating to 250 knots above 2500 feet per setting in FMS Departure Limit page.  We had discussed the SID and the propensity for aircrews to encounter non-normal issues during our preflight threats briefing. We had also discussed maintaining 200 knots during climbs away from intended course to destination on a flight leg earlier that day. I recall seeing the 200 knots below Class B note. The First Officer briefed the FMS Departure Limit page set at 2500 feet and I missed the chance to change it.  I thought from previous experience we would remain outside of the Class B shelf. I can only surmise this was a momentary lapse in the preflight setup. Perhaps I got distracted by some Captain's duty during briefing. The First Officer said that seeing the 230 knots restriction in the SID led him to believe 200 knots wasn't a necessary restriction.  That's a reasonable assumption and acceleration to 250 knots isn't prohibited if remaining outside Class B shelf.  We debriefed the event thoroughly and had a chance to redo the departure the next day with proper speed settings.
Departed [Runway] 30R at SJC via the TECKY3 Departure; speed restriction at MLPTS of 230 was met; however the speed on FMS went to 250 shortly after MLPTS.  This created a possible speed violation below the Class B shelf. Set the appropriate speed and altitude in the departure limit page on FMS. Include the note in the departure briefing.  The [airport] chart for SJC does include the speed limit note of 200 KIAS while under the SFO Class B.
An Air Carrier Captain reported exceeding 200 knots underneath Class B Airspace due to confusion over a speed restriction published on the SID which is greater than 200 knots.