B757 CREW FAILS TO COMPLY WITH AN ATC ALT XING RESTR. CREW CITES DISTR AS CLRNC ISSUED WHEN CABIN ATTENDANT ENTERS COCKPIT WITH A RPT OF A BURNING SMELL IN CABIN. CTLR LATER VECTORS ACFT FOR REMAINING CLB FOR TFC SEPARATION.

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FREQ/ALT; CLE/FL330. ATC FACILITY; CLE. LOCATION; 50 MI W DJB. GIVEN CLB CLRNC TO FL350 AND CROSS 10 MI W DJB AT FL350. DURING READBACK FLT ATTENDANT ENTERED COCKPIT WITH RPTED BURNING SMELL. SUBSEQUENT FREQ CHANGE AND FURTHER SUBSEQUENT FREQ CHANGE AND CLB TO FL370 RESULTED IN XING AT 10 MI E OF DJB. CTLR RPTED WE WERE 8 MI W OF DJB AND DIRECTED A TURN TO COMPLETE CLB. NO CONFLICTS RESULTED. UNCERTAIN WHETHER WE READ BACK 10 MI W OR E. DISTRACTED BY FLT ATTENDANT CABIN RPT. ACFT COULD HAVE MADE XING W BUT I PLANNED FOR E BECAUSE THAT'S WHAT I HEARD. SUPPLEMENTAL INFO FROM ACN 381437: FO FLYING RECEIVED CLRNC TO CROSS 10 MI E OF DJB FL350. AS CLRNC WAS BEING COPIED PURSER ENTERED WITH RPT OF BURNING SMELL IN CABIN. SUBSEQUENT CLRNC TO FL370 APPROX 10 MI W DJB CTLR QUERIES AS TO WHETHER WE WOULD MAKE FL350 AT 10 MI W OF DJB; STARTED MAX RATE CLB APPROX 8 DME FL343 GIVEN HDG 090 DEGS; CROSSED DJB FL360 CLBING; NO CONFLICTS NOTED. I WASN'T SURE AFTER DEBRIEFING WITH FO AS TO THE TRUE CLRNC AS I DIDN'T FINISH WRITING IT DOWN DUE TO INTERRUPTION.