Narrative:

Under clear weather conditions, landed runway 9R at atl. While exiting the runway tower was engaged in a high level of discussions with several other air carrier aircraft relavent to a problem with jax center having to do with traffic saturation and the need to clear these aircraft for takeoff as soon as possible. When we cleared the runway, the copilot understood the tower to say 'cleared to cross runway 9L' and he read back 'roger, cleared to cross 9L' hearing no further comments, we proceeded across the runway. I noticed at the time of crossing an air carrier just beginning its takeoff roll. No evasive action was necessary, as we were approximately. 7000'-8000' down a 10000' runway with more than adequate separation. Subsequent discussions with the tower supervisor on the phone indicated they had listened to the tapes, and the controller had said 'hold short of 9L' and we in fact had readback 'cleared to cross 9L' and the controller had missed the incorrect read back. His indication to me was it was an operational error on their part. I suspect the copilot might have heard the clearance for the aircraft on the takeoff roll and thought it was for us. - Unable to get the aircraft voice recorder as the aircraft departed immediately. Supplemental information in acn 83730: as we exited 9R on a highspeed taxiway tower made a transmission to us and the first officer read back 'our identify cleared to cross 9L' as we had static on one of the radios that tower frequency 119.1 was on, I had both radios on 119.1 with volume up at no time after I read back the crossing clearance did they say anything else.

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Original NASA ASRS Text

Title: ACR CROSSED ACTIVE RWY WHILE OTHER ACR WAS STARTING TKOF ROLL. OPERATIONAL ERROR.

Narrative: UNDER CLEAR WEATHER CONDITIONS, LANDED RWY 9R AT ATL. WHILE EXITING THE RWY TWR WAS ENGAGED IN A HIGH LEVEL OF DISCUSSIONS WITH SEVERAL OTHER AIR CARRIER ACFT RELAVENT TO A PROBLEM WITH JAX CENTER HAVING TO DO WITH TFC SATURATION AND THE NEED TO CLEAR THESE ACFT FOR TKOF AS SOON AS POSSIBLE. WHEN WE CLRED THE RUNWAY, THE COPLT UNDERSTOOD THE TWR TO SAY 'CLRED TO CROSS RUNWAY 9L' AND HE READ BACK 'ROGER, CLRED TO CROSS 9L' HEARING NO FURTHER COMMENTS, WE PROCEEDED ACROSS THE RWY. I NOTICED AT THE TIME OF XING AN AIR CARRIER JUST BEGINNING ITS TAKEOFF ROLL. NO EVASIVE ACTION WAS NECESSARY, AS WE WERE APPROX. 7000'-8000' DOWN A 10000' RWY WITH MORE THAN ADEQUATE SEPARATION. SUBSEQUENT DISCUSSIONS WITH THE TWR SUPERVISOR ON THE PHONE INDICATED THEY HAD LISTENED TO THE TAPES, AND THE CTLR HAD SAID 'HOLD SHORT OF 9L' AND WE IN FACT HAD READBACK 'CLRED TO CROSS 9L' AND THE CTLR HAD MISSED THE INCORRECT READ BACK. HIS INDICATION TO ME WAS IT WAS AN OPERATIONAL ERROR ON THEIR PART. I SUSPECT THE COPLT MIGHT HAVE HEARD THE CLRNC FOR THE ACFT ON THE TAKEOFF ROLL AND THOUGHT IT WAS FOR US. - UNABLE TO GET THE ACFT VOICE RECORDER AS THE ACFT DEPARTED IMMEDIATELY. SUPPLEMENTAL INFORMATION IN ACN 83730: AS WE EXITED 9R ON A HIGHSPEED TAXIWAY TWR MADE A XMISSION TO US AND THE F/O READ BACK 'OUR IDENT CLRED TO CROSS 9L' AS WE HAD STATIC ON ONE OF THE RADIOS THAT TWR FREQ 119.1 WAS ON, I HAD BOTH RADIOS ON 119.1 WITH VOLUME UP AT NO TIME AFTER I READ BACK THE XING CLRNC DID THEY SAY ANYTHING ELSE.

Data retrieved from NASA's ASRS site as of August 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.