Narrative:

Training student, night lndgs in closed traffic sjc runway 29. While on 3/4 mi final for runway 29, an aircraft flew under us at high speed. Our aircraft was at approximately 400-500 ft. The other aircraft was cleared for the ILS runway 30L approach. We were cleared to land runway 29. No time to react, we just watched it climb out VFR to san carlos.

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Original NASA ASRS Text

Title: AN INSTRUCTOR WITH A STUDENT PLT IN AN SMA HAVE AN NMAC WITH AN ACFT THAT CROSSES UNDER THEM WHILE THEY ARE ON SHORT FINAL APCH TO RWY 29 AT SJC.

Narrative: TRAINING STUDENT, NIGHT LNDGS IN CLOSED TFC SJC RWY 29. WHILE ON 3/4 MI FINAL FOR RWY 29, AN ACFT FLEW UNDER US AT HIGH SPD. OUR ACFT WAS AT APPROX 400-500 FT. THE OTHER ACFT WAS CLRED FOR THE ILS RWY 30L APCH. WE WERE CLRED TO LAND RWY 29. NO TIME TO REACT, WE JUST WATCHED IT CLB OUT VFR TO SAN CARLOS.

Data retrieved from NASA's ASRS site as of July 2007 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.