Narrative:

Air carrier abgd receiving vectors on palace 1 departure. Air carrier abcd was also on frequency. Heard abgd turn left 300 climb to 11000 ft. Did so and at 7000 ft controller said he cleared us only to 5000 ft. Then he cleared us to 7000 ft and turned us to 070 degrees. Clearance of left 300 degrees to 11000 ft was read back with no response to the negative by controller. Happened because of 2 company aircraft with like call signs and similar route of flight.

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Original NASA ASRS Text

Title: MDT FLC RESPONDS TO WRONG CALL SIGN. HDG DEV, ALTDEV.

Narrative: ACR ABGD RECEIVING VECTORS ON PALACE 1 DEP. ACR ABCD WAS ALSO ON FREQ. HEARD ABGD TURN L 300 CLB TO 11000 FT. DID SO AND AT 7000 FT CTLR SAID HE CLRED US ONLY TO 5000 FT. THEN HE CLRED US TO 7000 FT AND TURNED US TO 070 DEGS. CLRNC OF L 300 DEGS TO 11000 FT WAS READ BACK WITH NO RESPONSE TO THE NEGATIVE BY CTLR. HAPPENED BECAUSE OF 2 COMPANY ACFT WITH LIKE CALL SIGNS AND SIMILAR RTE OF FLT.

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.