G IV FLC ACKNOWLEDGES A CLRNC NOT MEANT FOR THEM TO TAXI IN POS AND HOLD ON RWY 30L AT MSP; WHICH RESULTED IN LNDG CORPORATE JET TFC EXECUTING A GAR.

Narrative

AT XA:03Z; ONE MSP TOWER CTLR WAS CTLING BOTH RWY 30L AND 30R ON DIFFERENT FREQS AND I THOUGHT I HEARD OUR ACFT TO 'POS AND HOLD; 30L; BE READY FOR AN IMMEDIATE.' I RESPONDED 'ROGER; CALL SIGN; POS AND HOLD 30L.' AT THE SAME TIME; UNKNOWN TO US; ANOTHER ACFT SQUASHED MY RESPONSE. WE WERE IN POS FOR APPROX ONE MINUTE; WHEN THE TWR CTLR SENT AN ACFT AROUND AND TOLD US TO VACATE THE RWY. AT XA:10Z A DIFFERENT CTLR AGAIN CLRED US FOR TAKEOFF. SEVERAL DAYS LATER; AFTER TALKING TO A MSP TWR SUPVR; WE DETERMINED THAT IF THE TWR CTLR HAD HEARD MY RESPONSE; HE WOULD HAVE TOLD US THAT THE TAKEOFF CLRNC WAS NOT FOR US. I THINK THIS SITUATION COULD HAVE BEEN PREVENTED IF THERE HAD BEEN ONE CTLR FOR EACH RWY OR IF VERY LIGHT TFC; ONE CTLR USING ONLY ONE FREQ FOR BOTH RWYS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT THE COMBINING OF FREQS WITH ANY OTHER TWR FUNCTION SHOULD BE AVOIDED WHEN USING MULTIPLE RWYS. HE ALSO BELIEVES THAT BY DOING THIS; IT WOULD BE THE SINGLE STRONGEST ACTION THE FAA CAN TAKE TO MITIGATE THE RWY INCURSION PROBLEM.