Narrative:

Holding short of runway 9 on taxiway south at bos, waiting for load closeout, we told tower on 119.1 that we didn't have our numbers yet. They told us to taxi down runway 9, then to turn left on runway 4R, followed by another left on taxiway east. We were told to hold on taxiway east until we got our numbers. When we received our closeout, we told tower, who told us to taxi straight ahead to be sequenced for runway 9, and to monitor 128.8, which we did. When we made the left turn onto taxiway south for runway 9, the tower controller asked us if we were going for runway 9. The tower controller asked us if we were going to be able to hold short of runway 4L, which we never heard as an instruction. We were actually clear of runway 4L, but there seemed to be a little confusion, due to monitoring a different tower frequency with unclr instructions. We did ask tower on 119.1 if we followed instructions correctly, and they answered in the affirmative. Supplemental information from acn 564533: after receiving numbers, captain took radios while I checked the numbers. I overheard vaguely the tower request that we move up in sequence and monitor another frequency. I heard the tower ask if we were 'able to make the turn and pull up further (on taxiway south)...short of runway 4.' as we pulled forward and clear, I noticed an aircraft at approximately 500 ft on short final for runway 4L. I then wondered if the captain was told to hold short of runway 4L on taxiway east by the previous frequency. If so, we did not hear such a transmission. It is also possible that I did not hear it because I was heads down checking the numbers.

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Original NASA ASRS Text

Title: AN A300 CREW, TAXIING FOR TKOF AT BOS, MISINTERPED A TAXI CLRNC, REQUIRING ATC'S REQUEST TO 'PULL UP FURTHER' IN ORDER TO CLR RWY.

Narrative: HOLDING SHORT OF RWY 9 ON TXWY S AT BOS, WAITING FOR LOAD CLOSEOUT, WE TOLD TWR ON 119.1 THAT WE DIDN'T HAVE OUR NUMBERS YET. THEY TOLD US TO TAXI DOWN RWY 9, THEN TO TURN L ON RWY 4R, FOLLOWED BY ANOTHER L ON TXWY E. WE WERE TOLD TO HOLD ON TXWY E UNTIL WE GOT OUR NUMBERS. WHEN WE RECEIVED OUR CLOSEOUT, WE TOLD TWR, WHO TOLD US TO TAXI STRAIGHT AHEAD TO BE SEQUENCED FOR RWY 9, AND TO MONITOR 128.8, WHICH WE DID. WHEN WE MADE THE L TURN ONTO TXWY S FOR RWY 9, THE TWR CTLR ASKED US IF WE WERE GOING FOR RWY 9. THE TWR CTLR ASKED US IF WE WERE GOING TO BE ABLE TO HOLD SHORT OF RWY 4L, WHICH WE NEVER HEARD AS AN INSTRUCTION. WE WERE ACTUALLY CLR OF RWY 4L, BUT THERE SEEMED TO BE A LITTLE CONFUSION, DUE TO MONITORING A DIFFERENT TWR FREQ WITH UNCLR INSTRUCTIONS. WE DID ASK TWR ON 119.1 IF WE FOLLOWED INSTRUCTIONS CORRECTLY, AND THEY ANSWERED IN THE AFFIRMATIVE. SUPPLEMENTAL INFO FROM ACN 564533: AFTER RECEIVING NUMBERS, CAPT TOOK RADIOS WHILE I CHKED THE NUMBERS. I OVERHEARD VAGUELY THE TWR REQUEST THAT WE MOVE UP IN SEQUENCE AND MONITOR ANOTHER FREQ. I HEARD THE TWR ASK IF WE WERE 'ABLE TO MAKE THE TURN AND PULL UP FURTHER (ON TXWY S)...SHORT OF RWY 4.' AS WE PULLED FORWARD AND CLR, I NOTICED AN ACFT AT APPROX 500 FT ON SHORT FINAL FOR RWY 4L. I THEN WONDERED IF THE CAPT WAS TOLD TO HOLD SHORT OF RWY 4L ON TXWY E BY THE PREVIOUS FREQ. IF SO, WE DID NOT HEAR SUCH A XMISSION. IT IS ALSO POSSIBLE THAT I DID NOT HEAR IT BECAUSE I WAS HEADS DOWN CHKING THE NUMBERS.

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.