Narrative:

At approximately XA35 EST air carrier X commenced a single engine taxi from gate E3. The taxi clearance was such: 'air carrier X taxi to runway 27L via txwys H, east, hold short runway 27R.' I read the clearance back, the captain understood the clearance and commenced the taxi. At the intersection of txwys east and K there was an asphalt (dip) area leading up to the hold short line of runway 27R. The captain elected to maintain a slow forward motion in order to keep the aircraft's momentum, in the event that we received a crossing clearance. That way the aircraft would not get bogged down on the asphalt portion of the taxiway. The ground controller was apparently (new), he/she was being supervised by another controller. A business jet landed on runway 27R, approximately 20 seconds passed, and we were issued a crossing clearance. The captain applied 50% N1 power, the aircraft slowly accelerated, then decelerated on the asphalt. The supervising ground controller ordered us to expedite. The captain added power, then upon noticing an A320 on a 2 mi final, elected to abruptly discontinue the crossing. The aircraft had just started to accelerate at that point, and came to a stop with the nose gear about 4 ft across the hold bar of runway 27R. The A320 aircraft was ordered to go around, and we were told to continue to cross. Factors: single engine taxi, lack of timely crossing clearance, taxiway condition at txwys east, K, and runway 27R, pilot lack authoritative action to either cross or hold short of the runway, inexperience of ground controller, and supervision of his/her actions by the training controller.

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Original NASA ASRS Text

Title: B737 FLT CREW WAS ISSUED AN EXPEDITED RWY XING CLRNC AT PHL RESULTING IN A GAR LIKELY CAUSED BY CTLR TRAINING.

Narrative: AT APPROX XA35 EST ACR X COMMENCED A SINGLE ENG TAXI FROM GATE E3. THE TAXI CLRNC WAS SUCH: 'ACR X TAXI TO RWY 27L VIA TXWYS H, E, HOLD SHORT RWY 27R.' I READ THE CLRNC BACK, THE CAPT UNDERSTOOD THE CLRNC AND COMMENCED THE TAXI. AT THE INTXN OF TXWYS E AND K THERE WAS AN ASPHALT (DIP) AREA LEADING UP TO THE HOLD SHORT LINE OF RWY 27R. THE CAPT ELECTED TO MAINTAIN A SLOW FORWARD MOTION IN ORDER TO KEEP THE ACFT'S MOMENTUM, IN THE EVENT THAT WE RECEIVED A XING CLRNC. THAT WAY THE ACFT WOULD NOT GET BOGGED DOWN ON THE ASPHALT PORTION OF THE TXWY. THE GND CTLR WAS APPARENTLY (NEW), HE/SHE WAS BEING SUPERVISED BY ANOTHER CTLR. A BUSINESS JET LANDED ON RWY 27R, APPROX 20 SECONDS PASSED, AND WE WERE ISSUED A XING CLRNC. THE CAPT APPLIED 50% N1 PWR, THE ACFT SLOWLY ACCELERATED, THEN DECELERATED ON THE ASPHALT. THE SUPERVISING GND CTLR ORDERED US TO EXPEDITE. THE CAPT ADDED PWR, THEN UPON NOTICING AN A320 ON A 2 MI FINAL, ELECTED TO ABRUPTLY DISCONTINUE THE XING. THE ACFT HAD JUST STARTED TO ACCELERATE AT THAT POINT, AND CAME TO A STOP WITH THE NOSE GEAR ABOUT 4 FT ACROSS THE HOLD BAR OF RWY 27R. THE A320 ACFT WAS ORDERED TO GO AROUND, AND WE WERE TOLD TO CONTINUE TO CROSS. FACTORS: SINGLE ENG TAXI, LACK OF TIMELY XING CLRNC, TXWY CONDITION AT TXWYS E, K, AND RWY 27R, PLT LACK AUTHORITATIVE ACTION TO EITHER CROSS OR HOLD SHORT OF THE RWY, INEXPERIENCE OF GND CTLR, AND SUPERVISION OF HIS/HER ACTIONS BY THE TRAINING CTLR.

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.