A319 captain crosses hold short line when he mistakes clearance for another aircraft with similar call sign. Tower controller observes problem and holds another aircraft for takeoff.

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Attributes
ACN	535883
Time
Date	200201
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : phl.airport
State Reference	PA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	A319
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	ground : holding
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : phl.tower
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	ground : position and hold
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 230 flight time total : 16000 flight time type : 1200
ASRS Report	535883
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	incursion : runway non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact other
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were taxiing to runway 27L with instructions to hold short of runway 27R at phl. Approaching runway 27R, the ground controller (who was just a little difficult to understand) gave a clearance to an aircraft (aircraft Y) to cross runway 27R. We were aircraft X and both the first officer and I believed the clearance was for us. There was no doubt in my mind that the clearance was for us, so I prepared to cross the runway. There must have been some doubt in the first officer's mind because he asked ground control to confirm the clearance was for us. I stopped the aircraft quickly as soon as I realized there was a doubt in the first officer's mind and we stopped well clear of the runway. The first officer had to ask twice and on the second call to ground control we were told to continue holding short of runway 27R. 3 aircraft landed while we waited to cross the runway. When we finally received our clearance to cross the runway, it dawned on me that part of my aircraft had been over the hold short line for runway 27R. We soon found out there was aircraft Y on the same frequency and preparing for takeoff also.

Original NASA ASRS Text

Title: A319 CAPT CROSSES HOLD SHORT LINE WHEN HE MISTAKES CLRNC FOR ANOTHER ACFT WITH SIMILAR CALL SIGN. TWR CTLR OBSERVES PROB AND HOLDS ANOTHER ACFT FOR TKOF.

Narrative: WE WERE TAXIING TO RWY 27L WITH INSTRUCTIONS TO HOLD SHORT OF RWY 27R AT PHL. APCHING RWY 27R, THE GND CTLR (WHO WAS JUST A LITTLE DIFFICULT TO UNDERSTAND) GAVE A CLRNC TO AN ACFT (ACFT Y) TO CROSS RWY 27R. WE WERE ACFT X AND BOTH THE FO AND I BELIEVED THE CLRNC WAS FOR US. THERE WAS NO DOUBT IN MY MIND THAT THE CLRNC WAS FOR US, SO I PREPARED TO CROSS THE RWY. THERE MUST HAVE BEEN SOME DOUBT IN THE FO'S MIND BECAUSE HE ASKED GND CTL TO CONFIRM THE CLRNC WAS FOR US. I STOPPED THE ACFT QUICKLY AS SOON AS I REALIZED THERE WAS A DOUBT IN THE FO'S MIND AND WE STOPPED WELL CLR OF THE RWY. THE FO HAD TO ASK TWICE AND ON THE SECOND CALL TO GND CTL WE WERE TOLD TO CONTINUE HOLDING SHORT OF RWY 27R. 3 ACFT LANDED WHILE WE WAITED TO CROSS THE RWY. WHEN WE FINALLY RECEIVED OUR CLRNC TO CROSS THE RWY, IT DAWNED ON ME THAT PART OF MY ACFT HAD BEEN OVER THE HOLD SHORT LINE FOR RWY 27R. WE SOON FOUND OUT THERE WAS ACFT Y ON THE SAME FREQ AND PREPARING FOR TKOF ALSO.

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.