Narrative:

We were flying our scheduled leg from san to lax. We landed after a visual approach and were in the landing roll. As I was calling for the first officer to start time as per our SOP, the controller gave a clearance for a company aircraft with a similar flight number a clearance to cross runway 25R. My first officer read back, cleared across with our flight number. When we got over to ground control, he told us that we took the other aircraft's clearance. I asked him if I should call the tower and he said no. The factors that contributed were: 1) similar flight number. 2) controller called in landing roll as I was making a required call. 3) our company has started a new numbering system for flight numbers. This has increased the workload and is causing confusion.

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Original NASA ASRS Text

Title: FLC OF AN EMBRAER 120 FAILED TO HOLD SHORT OF PARALLEL RWY AFTER LNDG DUE TO RESPONSE TO ANOTHER COMPANY'S CLRNC WITH A SIMILAR SOUNDING CALL SIGN.

Narrative: WE WERE FLYING OUR SCHEDULED LEG FROM SAN TO LAX. WE LANDED AFTER A VISUAL APCH AND WERE IN THE LNDG ROLL. AS I WAS CALLING FOR THE FO TO START TIME AS PER OUR SOP, THE CTLR GAVE A CLRNC FOR A COMPANY ACFT WITH A SIMILAR FLT NUMBER A CLRNC TO CROSS RWY 25R. MY FO READ BACK, CLRED ACROSS WITH OUR FLT NUMBER. WHEN WE GOT OVER TO GND CTL, HE TOLD US THAT WE TOOK THE OTHER ACFT'S CLRNC. I ASKED HIM IF I SHOULD CALL THE TWR AND HE SAID NO. THE FACTORS THAT CONTRIBUTED WERE: 1) SIMILAR FLT NUMBER. 2) CTLR CALLED IN LNDG ROLL AS I WAS MAKING A REQUIRED CALL. 3) OUR COMPANY HAS STARTED A NEW NUMBERING SYS FOR FLT NUMBERS. THIS HAS INCREASED THE WORKLOAD AND IS CAUSING CONFUSION.

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.