HAMPTON, NY, USA
N8864E
BOEING 727-225
USAF
LOCKHEED C-141
A FULL PERFORMANCE LEVEL CONTROLLER (FPL CTLR) AT SECTOR 31 OF BOSTON ARTCC WAS GIVING FAMILIARIZATION TRAINING TO ANOTHER FPL CTLR TO FAMILIARIZE THE TRAINEE WITH A NEW AREA THAT HAD BEEN TRANSFERRED FROM NEW YORK ARTCC TO BOSTON ARTCC. SECTOR 31 WAS CONSIDERED TO BE A RATHER COMPLEX & BUSY AREA. DURING A BUSY PERIOD AFTER TRAFFIC HAD 'PEAKED', THECTLRS WERE CONCENTRATING ON A POTENTIAL CONFLICT BETWEEN 2 ACFT WHEN ONE OF THEM (EASTERN FLT 380, A BOEING 727) BEGAN CONVERGING WITH A 3RD ACFT (MAC 67947, A USAF C-141). THE CONFLICT ALERT SYSTEM ACTIVATED & THE CTLRS ISSUED A TURN TO AVOID CONVERGENCE; HOWEVER, THE 2 ACFT PASSED WITHIN 1/2 MILE OF EACH OTHER WITH THE SAME ALTITUDE ASSIGNMENT. EA380 HADBEEN ASSIGNED AN ABNORMALLY LOW ALTITUDE (FL230) FOR ITS ROUTING. THE CONFLICT OCCURRED WHEN EA380 TURNED IN RESPONSE TO AN ARTCC CLEARANCE.
Source: NTSB Aviation Accident Database
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