Narrative:

We (student and instructor) were shooting a practice instrument approach (ILS runway 29) at hanscom field. We were communicating with tower who was sequencing us in with other landing traffic. Tower was also talking to another plane (baron) and told that plane they would follow us. Tower gave that plane at least 3 calls to clarify our position so they could sequence in behind us. As we were descending through 700 ft on the ILS, I noticed the plane off our left approaching us. He was base and started turning final. I took the controls from my student who was under the hood, and the plane passed 300 ft below us. The baron then reported having spotted us right above him.

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Original NASA ASRS Text

Title: A PA28 CFI AND STUDENT RPTED AN NMAC WITH A BARON AT BED, MA.

Narrative: WE (STUDENT AND INSTRUCTOR) WERE SHOOTING A PRACTICE INST APCH (ILS RWY 29) AT HANSCOM FIELD. WE WERE COMMUNICATING WITH TWR WHO WAS SEQUENCING US IN WITH OTHER LNDG TFC. TWR WAS ALSO TALKING TO ANOTHER PLANE (BARON) AND TOLD THAT PLANE THEY WOULD FOLLOW US. TWR GAVE THAT PLANE AT LEAST 3 CALLS TO CLARIFY OUR POS SO THEY COULD SEQUENCE IN BEHIND US. AS WE WERE DSNDING THROUGH 700 FT ON THE ILS, I NOTICED THE PLANE OFF OUR L APCHING US. HE WAS BASE AND STARTED TURNING FINAL. I TOOK THE CTLS FROM MY STUDENT WHO WAS UNDER THE HOOD, AND THE PLANE PASSED 300 FT BELOW US. THE BARON THEN RPTED HAVING SPOTTED US RIGHT ABOVE HIM.

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.