Narrative:

On flight abc 3 miles north of sprin intersection in contact with porto velho control we experienced a subsequent TCAS TA/RA in IFR conditions and maneuvered to avoid impact with other aircraft. We were at 330 in cruise flight on the airway. On coming traffic was displayed on the TCAS 1000 ft below our aircraft. I noted to the relief pilot who was in the left seat flying that the on coming aircraft was only 1000 ft below us. As the on coming aircraft passed the 10 mi band he began to climb into our airspace. I told the relief pilot to turn right off the airway to avoid, which he did. The on coming aircraft continued to climb toward us and we received a 'traffic, traffic' alert. It seemed as if the on coming aircraft had also turned toward us and was continuing his climb now at 400 ft below us. We also were climbing to avoid conflict. The relief pilot turned left to avoid when we got the full TA/RA. At that point we both grabbed the yoke and disconnected autoplt and autothrottles. We turned harder and pulled up harder to avoid impact. The TCAS displayed on coming aircraft within 100 ft and closing. While passing FL360 we broke out of the clouds in a left bank. The relief pilot first saw the lights and when I looked out the window I saw an airliner in a slight left bank passing my right window. I could see figures in the windows. Once we were clear of conflict I called porto velho control and told him what had just occurred. He just replied maintain 330 and acted as if he couldn't understand what I was telling him. I told him I would be writing up the incident. Another company flight called us on 123.45 to see if we were ok since they had heard it all on the radio. I was unable to find out who the oncoming aircraft was though I asked numerous times. Porto velho never acknowledged anything they just had me switch frequencies. No one in the back of the aircraft had any idea what had happened other than we were climbing. We returned to 330 and debriefed the captain when he returned from his break.

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Original NASA ASRS Text

Title: B767 FLT CREW EXPERIENCED CLOSE CALL WITH ANOTHER ACFT AT FL330 UNDER PORTO VELHO CTL IN BRAZIL.

Narrative: ON FLT ABC 3 MILES N OF SPRIN INTXN IN CONTACT WITH PORTO VELHO CTL WE EXPERIENCED A SUBSEQUENT TCAS TA/RA IN IFR CONDITIONS AND MANEUVERED TO AVOID IMPACT WITH OTHER ACFT. WE WERE AT 330 IN CRUISE FLT ON THE AIRWAY. ON COMING TFC WAS DISPLAYED ON THE TCAS 1000 FT BELOW OUR ACFT. I NOTED TO THE RELIEF PLT WHO WAS IN THE L SEAT FLYING THAT THE ON COMING ACFT WAS ONLY 1000 FT BELOW US. AS THE ON COMING ACFT PASSED THE 10 MI BAND HE BEGAN TO CLB INTO OUR AIRSPACE. I TOLD THE RELIEF PLT TO TURN R OFF THE AIRWAY TO AVOID, WHICH HE DID. THE ON COMING ACFT CONTINUED TO CLB TOWARD US AND WE RECEIVED A 'TFC, TFC' ALERT. IT SEEMED AS IF THE ON COMING ACFT HAD ALSO TURNED TOWARD US AND WAS CONTINUING HIS CLB NOW AT 400 FT BELOW US. WE ALSO WERE CLBING TO AVOID CONFLICT. THE RELIEF PLT TURNED L TO AVOID WHEN WE GOT THE FULL TA/RA. AT THAT POINT WE BOTH GRABBED THE YOKE AND DISCONNECTED AUTOPLT AND AUTOTHROTTLES. WE TURNED HARDER AND PULLED UP HARDER TO AVOID IMPACT. THE TCAS DISPLAYED ON COMING ACFT WITHIN 100 FT AND CLOSING. WHILE PASSING FL360 WE BROKE OUT OF THE CLOUDS IN A L BANK. THE RELIEF PLT FIRST SAW THE LIGHTS AND WHEN I LOOKED OUT THE WINDOW I SAW AN AIRLINER IN A SLIGHT L BANK PASSING MY RIGHT WINDOW. I COULD SEE FIGURES IN THE WINDOWS. ONCE WE WERE CLEAR OF CONFLICT I CALLED PORTO VELHO CTL AND TOLD HIM WHAT HAD JUST OCCURRED. HE JUST REPLIED MAINTAIN 330 AND ACTED AS IF HE COULDN'T UNDERSTAND WHAT I WAS TELLING HIM. I TOLD HIM I WOULD BE WRITING UP THE INCIDENT. ANOTHER COMPANY FLT CALLED US ON 123.45 TO SEE IF WE WERE OK SINCE THEY HAD HEARD IT ALL ON THE RADIO. I WAS UNABLE TO FIND OUT WHO THE ONCOMING ACFT WAS THOUGH I ASKED NUMEROUS TIMES. PORTO VELHO NEVER ACKNOWLEDGED ANYTHING THEY JUST HAD ME SWITCH FREQUENCIES. NO ONE IN THE BACK OF THE ACFT HAD ANY IDEA WHAT HAD HAPPENED OTHER THAN WE WERE CLBING. WE RETURNED TO 330 AND DEBRIEFED THE CAPT WHEN HE RETURNED FROM HIS BREAK.

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.