Narrative:

Air carrier X was coordinated with new york center at FL330. Air carrier X checked in with R70 (jax center) at FL350. Air carrier X was to have been descended to FL330 prior to switching to new york arinc. The aircraft became a factor in an incident with another aircraft in new york center's airspace at FL350. The error on my part, I think, was due to moderate to busy traffic at the time. I did not have a d-side controller at the time. Discovered by new york center and was informed by them about 20 mins after aircraft was switched to arinc. Supplemental information from acn 184103: I was working radar position and coordinated FL330 with ZNY (new york). I was relieved and briefed relieving controller on air carrier X. When I came back to work, I was told that air carrier X reported passing air carrier Y at his altitude. Supplemental information from acn 183863: air carrier X was cleared via diw AR7 miloe AR4 smelt G431 elkas R763 gtk flight plan route at FL330. Washington center asked if we could make FL350. I accepted FL350, and climbed to be level prior to diw. The next sector was jax center. They assigned us a heading of 190 degree until clear of warning areas, then direct to jesse. Approximately 60 NM northwest of jesse we observed an oncoming air carrier Y which appeared to be at our altitude. Due to the direct routing we were not on the centerline of the airway, fortunately. The air carrier Y passed off our left wing approximately 1/2 mi and contacted air carrier Y crew on 130.55 and confirmed that we were both assigned FL350. I immediately called new york oceanic on HF and we were instructed to descend and maintain FL330.

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Original NASA ASRS Text

Title: ACR X HAD LTSS FROM ACR Y. SYS ERROR.

Narrative: ACR X WAS COORDINATED WITH NEW YORK CENTER AT FL330. ACR X CHKED IN WITH R70 (JAX CENTER) AT FL350. ACR X WAS TO HAVE BEEN DSNDED TO FL330 PRIOR TO SWITCHING TO NEW YORK ARINC. THE ACFT BECAME A FACTOR IN AN INCIDENT WITH ANOTHER ACFT IN NEW YORK CENTER'S AIRSPACE AT FL350. THE ERROR ON MY PART, I THINK, WAS DUE TO MODERATE TO BUSY TFC AT THE TIME. I DID NOT HAVE A D-SIDE CTLR AT THE TIME. DISCOVERED BY NEW YORK CENTER AND WAS INFORMED BY THEM ABOUT 20 MINS AFTER ACFT WAS SWITCHED TO ARINC. SUPPLEMENTAL INFO FROM ACN 184103: I WAS WORKING RADAR POS AND COORDINATED FL330 WITH ZNY (NEW YORK). I WAS RELIEVED AND BRIEFED RELIEVING CTLR ON ACR X. WHEN I CAME BACK TO WORK, I WAS TOLD THAT ACR X RPTED PASSING ACR Y AT HIS ALT. SUPPLEMENTAL INFO FROM ACN 183863: ACR X WAS CLRED VIA DIW AR7 MILOE AR4 SMELT G431 ELKAS R763 GTK FLT PLAN RTE AT FL330. WASHINGTON CENTER ASKED IF WE COULD MAKE FL350. I ACCEPTED FL350, AND CLBED TO BE LEVEL PRIOR TO DIW. THE NEXT SECTOR WAS JAX CENTER. THEY ASSIGNED US A HDG OF 190 DEG UNTIL CLR OF WARNING AREAS, THEN DIRECT TO JESSE. APPROX 60 NM NW OF JESSE WE OBSERVED AN ONCOMING ACR Y WHICH APPEARED TO BE AT OUR ALT. DUE TO THE DIRECT RTING WE WERE NOT ON THE CENTERLINE OF THE AIRWAY, FORTUNATELY. THE ACR Y PASSED OFF OUR L WING APPROX 1/2 MI AND CONTACTED ACR Y CREW ON 130.55 AND CONFIRMED THAT WE WERE BOTH ASSIGNED FL350. I IMMEDIATELY CALLED NEW YORK OCEANIC ON HF AND WE WERE INSTRUCTED TO DSND AND MAINTAIN FL330.

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.