B737 FLC ACKNOWLEDGED STL TAXI INTO POS AND HOLD; ONLY TO BE CHALLENGED BY STL LCL CTLR THAT THE CLRNC WAS FOR ANOTHER ACFT.

Narrative

TAXI CLRNC GIVEN: TAXI TO RWY 30L VIA TXWY D; TO REMAIN SAME FREQ (127.55/METERING). COMPLETED PRETKOF CHKLIST DOWN TO THE LINE ON TXWY D. AT THE END OF TXWY D; CHANGED TO TWR 118.5. TWR STATED 'ACR X POS AND HOLD RWY 30L.' COMPLETED BELOW THE LINE; BEGAN TAXI ONTO RWY 30L. NO ACFT ON FINAL; ON THE RWY; OR DEPARTING. AN ACR Y ACFT WAS ON TXWY A. TWR STATED THE ACR Y FLT WAS FIRST AND WE WERE TO FOLLOW. RESPONDED TO TWR THAT SEQUENCE INFO WAS NOT RECEIVED OR READ BACK. TWR STATED HE WAS NOT SURE IF SEQUENCE INFO WAS GIVEN WITH POS AND HOLD CLRNC OR EARLIER; AND WOULD HAVE TO CHK THE TAPES. TWR INSTRUCTED US TO CROSS RWY 30L; MAKE A 180 DEG TURN ON TXWY P; THEN HOLD SHORT RWY 30L ON TXWYS. AFTER ACR Y DEPARTED; RECEIVED TKOF CLRNC; DEPARTED UNEVENTFULLY TO OKC. CALLED AND SPOKE WITH TWR SUPVR/CTLR WORKING THIS FLT. HE STATED NO RECORD OF THIS EVENT HAD BEEN LOGGED AND WOULD NOT BE. HE WAS VERY HELPFUL AND UNDERSTANDING. HE HAD NOT REVIEWED THE TAPES; BUT CONCLUDED THAT THE SEQUENCE INFO MUST HAVE BEEN GIVEN BEFORE OUR CHANGING TO TWR; AND SINCE NO ACFT WAS AHEAD OF US; TAXIED ONTO THE RWY WHEN CLRED POS AND HOLD. WE INFORMED THE TWR SUPVR THAT STL GND MOVEMENT WAS A HIGH PRIORITY BRIEFING ITEM THAT DAY; AND HAD PLACED ADDED FOCUS ON ALL GND MOVEMENT INSTRUCTIONS. HE WAS ADAMANT THAT THIS EVENT WAS NOT AN ACTION ITEM. WE (CAPT/FO) DISCUSSED THE EVENT AND DETERMINED THAT A POS AND HOLD CLRNC TO RWYS WITH MORE THAN 1 ACCESS RTE TO THE DEP END SHOULD BE CLARIFIED FOR SEQUENCE INFO.