LJ-35 FLC CROSSED RWY 27 HOLD SHORT LINE; STATING DISPLACE THRESHOLD CONDITION DOES NOT REFLECT RWY HOLD MARKINGS WHERE ONE WOULD EXPECT SUCH MARKINGS.

Narrative

OUR ACFT (X) OVERRAN THE HOLD SHORT LINE FOR RWY 27 AT WILLIAMSPORT; PA (IPT). WE WERE CLRED BY GND CTL FROM THE RAMP TO RWY 27. THIS INVOLVED CROSSING INACTIVE RWYS. WE VERIFIED BY A SECOND CALL THAT WE WERE CLRED TO CROSS AND PROCEED TO RWY 27 WITHOUT A HOLD SHORT. THE WEATHER WAS 10 MI VISIBILITY AND CLR OF CLOUDS. THERE WERE NO OTHER ACFT TAXIING OR OPERATING IN THE PATTERN. WE HAD COMPLETED THE TAXI CHECKLIST IN CHALLENGE AND RESPONSE STYLE JUST AS WE APCHED RWY 27. AT THIS TIME; GND CTL POLITELY INFORMED US THAT THE RWY HAD A DISPLACED HOLD LINE AND INDEED THERE WAS NO LINE AT THE RWYS BORDER AS ONE MIGHT HAVE EXPECTED. THERE WAS NO TFC AND THE TWR CLRED US ONTO THE RWY WITHOUT FURTHER MENTION. AS WE WERE NEW TO THIS FIELD; WE HAD MADE A GOOD STUDY OF A COMMERCIAL CHART ARPT LAYOUT AND NO SPECIAL NOTES EXIST TO POINT OUT THIS UNUSUALLY EXAGGERATED HOLD SHORT POINT. WHILE WE ARE SURE THE HOLD LINES ARE PAINTED ON THE TXWY; THIS POINT ON TXWY A SHOULD BE MADE HIGHLY VISIBLE TO PLTS DUE TO ITS UNUSUAL LOCATION. CREWS THAT ARE COMPLETING CHECKS IN COMPLICATED ACFT WILL CERTAINLY OPERATE SAFER WITH EFFECTIVE NOTIFICATION OF NON STANDARD PROC. FROM THE TWR'S RESPONSE; WE FELT THAT THIS HAPPENS OFTEN AT IPT. NOTATION ON THE ARPT DIAGRAM AS WELL AS EFFECTIVE SIGNAGE WOULD HAVE HELPED THIS SIT.