Narrative:

Proceeding direct to nor versus filed route UR10 control UZ706 nor, FL360. Paris control cleared our flight to FL340 and asked us to maintain a min of 1000 FPM in the descent, in the same transmission they gave us a frequency change to maastrich control. Paris did not respond to our readback of the clearance, so we switched to mass. The frequency was very congested. The captain made 4-5 xmissions, but got no response. We could hear other aircraft and mass transmitting in a male voice. We heard a blocked transmission telling someone to stop at FL345. First officer leveled at FL345. Still, no luck with mass with all 3 crew members transmitting and checking connections. Right radio was also tried. TCASII showed converging traffic at 2 O'clock and FL344. Captain told the first officer to climb back to FL360, which was accomplished. Other aircraft passed below us at FL344. After leveling at FL360, another voice (female) came up on mass, and we were told to identify if we could hear. We were given a new frequency, and when we switched, we were told that the male controller was having radio problems on the first mass frequency. Female controller asked us to relay what we had seen and done, and then said that they were unable to hear us during that period. She also said that paris had passed that we were cleared to FL320, but we had heard and read back FL340 with no confirmation from paris.

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Original NASA ASRS Text

Title: B767 FLC HAS TCASII DURING DSCNT FROM CRUISE ALT.

Narrative: PROCEEDING DIRECT TO NOR VERSUS FILED RTE UR10 CTL UZ706 NOR, FL360. PARIS CTL CLRED OUR FLT TO FL340 AND ASKED US TO MAINTAIN A MIN OF 1000 FPM IN THE DSCNT, IN THE SAME XMISSION THEY GAVE US A FREQ CHANGE TO MAASTRICH CTL. PARIS DID NOT RESPOND TO OUR READBACK OF THE CLRNC, SO WE SWITCHED TO MASS. THE FREQ WAS VERY CONGESTED. THE CAPT MADE 4-5 XMISSIONS, BUT GOT NO RESPONSE. WE COULD HEAR OTHER ACFT AND MASS XMITTING IN A MALE VOICE. WE HEARD A BLOCKED XMISSION TELLING SOMEONE TO STOP AT FL345. FO LEVELED AT FL345. STILL, NO LUCK WITH MASS WITH ALL 3 CREW MEMBERS XMITTING AND CHKING CONNECTIONS. R RADIO WAS ALSO TRIED. TCASII SHOWED CONVERGING TFC AT 2 O'CLOCK AND FL344. CAPT TOLD THE FO TO CLB BACK TO FL360, WHICH WAS ACCOMPLISHED. OTHER ACFT PASSED BELOW US AT FL344. AFTER LEVELING AT FL360, ANOTHER VOICE (FEMALE) CAME UP ON MASS, AND WE WERE TOLD TO IDENT IF WE COULD HEAR. WE WERE GIVEN A NEW FREQ, AND WHEN WE SWITCHED, WE WERE TOLD THAT THE MALE CTLR WAS HAVING RADIO PROBS ON THE FIRST MASS FREQ. FEMALE CTLR ASKED US TO RELAY WHAT WE HAD SEEN AND DONE, AND THEN SAID THAT THEY WERE UNABLE TO HEAR US DURING THAT PERIOD. SHE ALSO SAID THAT PARIS HAD PASSED THAT WE WERE CLRED TO FL320, BUT WE HAD HEARD AND READ BACK FL340 WITH NO CONFIRMATION FROM PARIS.

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.