Narrative:

Air carrier X departed from boston to bangor, me, on an IFR plan, conditions were VFR departing en route and at the destination. I was the PNF, the first officer was flying the leg from boston to bangor. At about 500 ft MSL we were instructed to contact departure on frequency 133.0. I switched frequency and was proceeding with cockpit duties as normal. At about 900 ft MSL I contacted departure and was instructed to turn right a 090 heading. That was done and also noted air carrier Y at our 9:00 position and the jet also had visual contact with our plane. We were later vectored to northwest heading and cleared on course as filed. When returning that afternoon as a passenger from bangor to boston I was asked to contact the boston approach control facility. I called them and they had told me that min separation had not been maintained on departure. They said that the tower controller had instructed a 010 heading but neither one of us had heard the heading only acknowledging the handoff from tower to departure. Also the air carrier Y was not squawking the appropriate code. Air carrier Y was also instructed to turn to a certain heading upon reaching the 4 DME. The boston DME part of the VOR was notamed as OTS that day.

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Original NASA ASRS Text

Title: ACR X NON ADHERENCE TO ATC CLRNC (RADAR VECTOR HDG) HAD LTSS FROM ACR Y. SYS ERROR.

Narrative: ACR X DEPARTED FROM BOSTON TO BANGOR, ME, ON AN IFR PLAN, CONDITIONS WERE VFR DEPARTING ENRTE AND AT THE DEST. I WAS THE PNF, THE FO WAS FLYING THE LEG FROM BOSTON TO BANGOR. AT ABOUT 500 FT MSL WE WERE INSTRUCTED TO CONTACT DEP ON FREQ 133.0. I SWITCHED FREQ AND WAS PROCEEDING WITH COCKPIT DUTIES AS NORMAL. AT ABOUT 900 FT MSL I CONTACTED DEP AND WAS INSTRUCTED TO TURN R A 090 HDG. THAT WAS DONE AND ALSO NOTED ACR Y AT OUR 9:00 POS AND THE JET ALSO HAD VISUAL CONTACT WITH OUR PLANE. WE WERE LATER VECTORED TO NW HDG AND CLRED ON COURSE AS FILED. WHEN RETURNING THAT AFTERNOON AS A PAX FROM BANGOR TO BOSTON I WAS ASKED TO CONTACT THE BOSTON APCH CTL FACILITY. I CALLED THEM AND THEY HAD TOLD ME THAT MIN SEPARATION HAD NOT BEEN MAINTAINED ON DEP. THEY SAID THAT THE TWR CTLR HAD INSTRUCTED A 010 HDG BUT NEITHER ONE OF US HAD HEARD THE HDG ONLY ACKNOWLEDGING THE HDOF FROM TWR TO DEP. ALSO THE ACR Y WAS NOT SQUAWKING THE APPROPRIATE CODE. ACR Y WAS ALSO INSTRUCTED TO TURN TO A CERTAIN HDG UPON REACHING THE 4 DME. THE BOSTON DME PART OF THE VOR WAS NOTAMED AS OTS THAT DAY.

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.