Narrative:

While departing westfield for our practice training area (north of northampton airport), we were flying northeast at 3000 ft. Once we passed northampton I had my student make a right turn to a 120 degree heading (the student was hooded and instrument reference at all times). After about 30 seconds, I cleared left and asked for a left turn to 030 degree (all turns were standard rate at 100 KIAS). As we were approaching the 030 degrees, I saw a C5 approaching from our 7:30-8 O'clock position and on same heading. It was below us, but was lower (estimated at 500 ft below). When I saw it I took the controls and began an easy turn to the right to ensure separation. At T he time I had switched to northampton CTAF which is our school's common practice. However, the C5's usually work bradley approach. Had we monitored bradley, we may have known about the traffic behind us flying northeast. Given the position of the C5 when I saw it and our previous heading, I assume the C5 would have been at our 5 O'clock position when we were on the 120 degree heading. Since we were turning left, it would have been next to impossible to see it until we were in the turn. Neither the C5 or I took evasive action, and although altitude separation may have been adequate, horizontal separation was maybe 500-1000 ft?

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Original NASA ASRS Text

Title: AN INSTRUCTOR PLT, IN AN SMA, RPTS SEEING A C5 NEAR HIS ACFT WHILE HE WAS FLYING, WITH A STUDENT UNDER THE HOOD, TOWARD HIS USUAL PRACTICE AREA. THE C5 STAYED APPROX 500 FT BELOW AND 500 FT TO ONE SIDE.

Narrative: WHILE DEPARTING WESTFIELD FOR OUR PRACTICE TRAINING AREA (N OF NORTHAMPTON ARPT), WE WERE FLYING NE AT 3000 FT. ONCE WE PASSED NORTHAMPTON I HAD MY STUDENT MAKE A R TURN TO A 120 DEG HDG (THE STUDENT WAS HOODED AND INST REF AT ALL TIMES). AFTER ABOUT 30 SECONDS, I CLRED L AND ASKED FOR A L TURN TO 030 DEG (ALL TURNS WERE STANDARD RATE AT 100 KIAS). AS WE WERE APCHING THE 030 DEGS, I SAW A C5 APCHING FROM OUR 7:30-8 O'CLOCK POS AND ON SAME HEADING. IT WAS BELOW US, BUT WAS LOWER (ESTIMATED AT 500 FT BELOW). WHEN I SAW IT I TOOK THE CTLS AND BEGAN AN EASY TURN TO THE R TO ENSURE SEPARATION. AT T HE TIME I HAD SWITCHED TO NORTHAMPTON CTAF WHICH IS OUR SCHOOL'S COMMON PRACTICE. HOWEVER, THE C5'S USUALLY WORK BRADLEY APCH. HAD WE MONITORED BRADLEY, WE MAY HAVE KNOWN ABOUT THE TFC BEHIND US FLYING NE. GIVEN THE POS OF THE C5 WHEN I SAW IT AND OUR PREVIOUS HEADING, I ASSUME THE C5 WOULD HAVE BEEN AT OUR 5 O'CLOCK POS WHEN WE WERE ON THE 120 DEG HDG. SINCE WE WERE TURNING L, IT WOULD HAVE BEEN NEXT TO IMPOSSIBLE TO SEE IT UNTIL WE WERE IN THE TURN. NEITHER THE C5 OR I TOOK EVASIVE ACTION, AND ALTHOUGH ALT SEPARATION MAY HAVE BEEN ADEQUATE, HORIZ SEPARATION WAS MAYBE 500-1000 FT?

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.