Narrative:

At pwk, my copilot (PNF) received our taxi instructions which were to taxi to runway 16 via runway 30 and hold short of runway 24. As we ran through the checklists, the controller (ground) asked us if we wanted runway 24. I had my copilot answer 'no' and then I asked the controller how much runway was available. (I did not have the airport diagram in front of me at the time.) the controller answered 'full length,' then told me the length which was shorter than I wanted. The controller again cleared us to runway 16 and hold short of runway 24. A short while later I noticed that my nosewheel was on runway 24. I did not realize that I was actually taxiing onto the runway so I stopped. At this time the controller cleared us to cross runways 24 and 34 and taxi to runway 16. Neither I, nor my copilot, saw the hold short markings at runway 24. To my knowledge there was not an aircraft taking off or landing on runway 24 at this time. Factors that I believe contributed to this were as follows: 1) pilot's unfamiliarity with pwk. 2) using checklists at a particularly confusing airport while taxiing. 3) narrow runways that looked too narrow to be an actual runway. 4) PF letting the less experienced copilot guide him on the airport. 5) confusing airport along with a confusing intersection.

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Original NASA ASRS Text

Title: BE10 KING AIR ACFT TAXIING AND CLRED TO HOLD SHORT OF RWY. RPTR TAXIED ONTO RWY BEFORE RECOGNIZING IT AND THEN STOPPED. TWR CTLR CLRED ACFT ACROSS.

Narrative: AT PWK, MY COPLT (PNF) RECEIVED OUR TAXI INSTRUCTIONS WHICH WERE TO TAXI TO RWY 16 VIA RWY 30 AND HOLD SHORT OF RWY 24. AS WE RAN THROUGH THE CHKLISTS, THE CTLR (GND) ASKED US IF WE WANTED RWY 24. I HAD MY COPLT ANSWER 'NO' AND THEN I ASKED THE CTLR HOW MUCH RWY WAS AVAILABLE. (I DID NOT HAVE THE ARPT DIAGRAM IN FRONT OF ME AT THE TIME.) THE CTLR ANSWERED 'FULL LENGTH,' THEN TOLD ME THE LENGTH WHICH WAS SHORTER THAN I WANTED. THE CTLR AGAIN CLRED US TO RWY 16 AND HOLD SHORT OF RWY 24. A SHORT WHILE LATER I NOTICED THAT MY NOSEWHEEL WAS ON RWY 24. I DID NOT REALIZE THAT I WAS ACTUALLY TAXIING ONTO THE RWY SO I STOPPED. AT THIS TIME THE CTLR CLRED US TO CROSS RWYS 24 AND 34 AND TAXI TO RWY 16. NEITHER I, NOR MY COPLT, SAW THE HOLD SHORT MARKINGS AT RWY 24. TO MY KNOWLEDGE THERE WAS NOT AN ACFT TAKING OFF OR LNDG ON RWY 24 AT THIS TIME. FACTORS THAT I BELIEVE CONTRIBUTED TO THIS WERE AS FOLLOWS: 1) PLT'S UNFAMILIARITY WITH PWK. 2) USING CHKLISTS AT A PARTICULARLY CONFUSING ARPT WHILE TAXIING. 3) NARROW RWYS THAT LOOKED TOO NARROW TO BE AN ACTUAL RWY. 4) PF LETTING THE LESS EXPERIENCED COPLT GUIDE HIM ON THE ARPT. 5) CONFUSING ARPT ALONG WITH A CONFUSING INTXN.

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.