PILATUS PC12 CREW HAD A RWY INCURSION ON RWY 27R AT PHL.

Narrative

I CALLED FOR TAXI CLRNC AT PHL. WE WERE INSTRUCTED TO TAXI TO RWY 35 AT INTXN K; USING TXWYS A AND D. WE WERE ALSO TOLD TO HOLD SHORT OF RWYS 8 AND 26 ON TXWY D. AS WE STARTED OUR TAXI FROM THE RAMP ON TXWY A; WE NOTICED THE AFTERNOON SUN WAS MAKING IT VERY DIFFICULT TO SEE ANY DISTANCE DURING THE TAXI. WE HELD SHORT OF RWYS 8 AND 26 AS INSTRUCTED ON TXWY D AND WERE CLRED TO CROSS RWYS 8 AND 26. WE CONTINUED OUR TAXI INTO THE SUN ON TXWY D TOWARD RWY 35 AND INTXN K CHKING FOR LNDG TFC ON RWY 27 WHICH TXWY D CROSSES. INTXN 35 AND TXWY K IS LOCATED JUST N OF RWY 27R. NOT SEEING INTXN K DUE TO THE SUN AND NOT BEING GIVEN ANY HOLD SHORT INSTRUCTIONS CONCERNING RWY 27R; WE CHKED FOR TFC AND STARTED TO CROSS. THE GND CTLR THEN CAME BACK AND SAID DO A 180 DEG TURN; INTXN K IS BEHIND YOU. AT NO TIME WAS THERE A TFC OR SAFETY ISSUE. WHAT DID I LEARN FROM THIS? ON THAT DAY 2 THINGS BECAME VERY CLR. FROM NOW ON THE PF AS WELL AS THE PNF WILL HAVE A COPY OF THE ARPT DIAGRAM IN FRONT OF THEM. ON THIS TRIP THERE WAS ONLY 1 COPY. SECONDLY; WHEN VISIBILITY IS RESTR BY BRIGHT SUN OR OTHER FORMS OF WX I WILL GET A PROGRESSIVE TAXI CLRNC. IF WE WOULD HAVE DONE THESE 2 ITEMS ON THIS PARTICULAR DAY WE WOULD NOT HAVE HAD THIS PROB.