Beechcraft Twin Piston Undifferentiated or Other Model
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Flight Instructor; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 100; Flight Crew Total 15500; Flight Crew Type 250
Distraction
Conflict NMAC
Air Traffic Control Issued Advisory / Alert
Procedure; Airspace Structure; Human Factors
I was giving flight instruction in a light twin. I was approaching Montgomery Field in San Diego to give my student a single engine approach using Montgomery Field's ILS in VFR conditions. I was outside their Class D airspace and above Gillespie Fields Class D airspace. I was waiting for an opening to communicate with Montgomery's Tower when I head a person saying that he almost had a mid-air collision with a twin engine aircraft. At that moment I was able to make contact with Montgomery Tower. They asked me if I had just seen an aircraft go by. I told them I had not seen anything. They gave me permission to use the ILS for the approach and then gave me permission to land. The other aircraft was asked if they wanted to report a near mid-air and they said they would when they returned. About 2 hours later I received a call to contact the Tower. I made contact and they asked me questions about this incident. They told me that the reporting aircraft said that he was 50 FT above my aircraft and about 100 yards to the right of my plane. They also said that at the moment of the near mid-air they became very busy and could not give traffic advisories at that time. I gave them all the facts that I didn't see the other aircraft and what my altitude and heading were. I was informed that there was no pilot deviation; but need my information as when a near mid-air is reported they had to file a report. The problem with that airspace around Montgomery Field is San Diego's Class B airspace the Gillespie Field's airspace is that all traffic is funneled into a very small space of sky trying to get to Montgomery Field without talking to anyone.
Twin Beechcraft instructor pilot; above Gillespie Fields class D airspace; is informed by ATC that he may have had a NMAC. The reporter laments the very constricted airspace.