Small Aircraft
Flight Crew Private
Flight Crew Last 90 Days 12; Flight Crew Total 900; Flight Crew Type 200
Situational Awareness; Training / Qualification
Airspace Violation All Types; Conflict NMAC; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Took Evasive Action
I was flying simulated IFR (under the hood) at 2100 ft. (based on the SQL altimeter setting) near the WSW (magnetic) edge of PAO Class D airspace; maneuvering into straight-in approach position for landing SQL Runway 30. (The dashed box on the San Francisco TAC chart indicates that the PAO Class D airspace ceiling is 2000 ft. MSL. It depicts a radius of 3 nm in the vicinity of the incident.)ADSB audio warned us of nearby traffic. The ADSB 2 mile radius display screen indicated a relative height of -100 ft. (and after evasive action; +100 ft.) yellow target; converging courses; aircraft to our right. My CFII instructor; in the right seat; took control of the aircraft and took evasive action by turning to the left. Thereafter; I reassumed control.Immediately after landing at SQL; SQL Tower advised that PAO Tower said we were supposed to remain clear of PAO airspace. The implication was that we had penetrated their airspace; although we didn't think we had.
General aviation pilot reported while on an instrument training flight they had a near mid-air collision and possible airspace incursion.