Narrative:

Bwi ground cleared me to taxi and follow a DC10 to runway 15R. The DC10 was around a curve in the taxiway and I was not sure which taxiway the DC10 was using. I was not given specific instructions on which taxiway to use; so I started taxiing on taxiway a and ground then advised me that I was not authority/authorized to taxi on taxiway a and asked me to hold position. I then asked to taxi on taxiway a to taxiway F and then to taxiway P which ground said to taxi at my own discretion to taxiway F and taxiway P. Even though the airport diagram does have a note that aircraft B767 and larger were not authority/authorized to taxi on taxiway a at my position; I think the problem I encountered could have been avoided if ground control had given me specific taxi instructions instead of simply saying 'follow the DC10 to runway 15R.'

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Original NASA ASRS Text

Title: B767 AT BWI TAXIING FOR DEP ON RWY 15R IS ISSUED A FOLLOW ACFT CLRNC WHICH RESULTED IN THE CREW TAXIING ON AN UNAUTH TXWY.

Narrative: BWI GND CLRED ME TO TAXI AND FOLLOW A DC10 TO RWY 15R. THE DC10 WAS AROUND A CURVE IN THE TXWY AND I WAS NOT SURE WHICH TXWY THE DC10 WAS USING. I WAS NOT GIVEN SPECIFIC INSTRUCTIONS ON WHICH TXWY TO USE; SO I STARTED TAXIING ON TXWY A AND GND THEN ADVISED ME THAT I WAS NOT AUTH TO TAXI ON TXWY A AND ASKED ME TO HOLD POS. I THEN ASKED TO TAXI ON TXWY A TO TXWY F AND THEN TO TXWY P WHICH GND SAID TO TAXI AT MY OWN DISCRETION TO TXWY F AND TXWY P. EVEN THOUGH THE ARPT DIAGRAM DOES HAVE A NOTE THAT ACFT B767 AND LARGER WERE NOT AUTH TO TAXI ON TXWY A AT MY POS; I THINK THE PROB I ENCOUNTERED COULD HAVE BEEN AVOIDED IF GND CTL HAD GIVEN ME SPECIFIC TAXI INSTRUCTIONS INSTEAD OF SIMPLY SAYING 'FOLLOW THE DC10 TO RWY 15R.'

Data retrieved from NASA's ASRS site as of January 2009 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.