Narrative:

While taxiing to an approved engine run area to do an engine run, I had problems with finding the taxiway turnoffs due to unfamiliarity with the taxiway system layout. I am an aircraft inspector ferried out of ZZZ1. I had overrun the first turnoff due to misunderstanding the radio operator's instructions assuming the turnoff was the following taxiway. At this point I should have asked for 'progressive taxi instructions' but was unaware of the procedure at the time. The tower tried again to marshall me to the run-up area but again I missed the second turnoff and had to hold short of an active runway. This occurred at prime morning launch time XA30 am where traffic is heavy. I was informed that I was nosed over the hold short line and that an aircraft incursion had occurred by a landing aircraft. Upon receiving the progressive taxi instructions I was able to get to the engine run area and complete the task. Factors that led to this situation were unfamiliarity with the airport, miscom with my right seat radio man (who was the local station manager), the rising sun also made reading taxiway signs difficult to decipher. Although qualified and trained in taxi procedures it is not part of my every day duties and I often go months without taxiing an aircraft and therefore I am not as proficient as I'd like to be. The radio man did a good job of calling out txwys but not being familiar with the airport, progressive taxiway instructions would have worked better. There were no local mechanics available to taxi the aircraft for me, hence the station manager riding right seat for the taxi/engine run. There was no aircraft damaged or accident of any type. The incursion was caused by being nosed over the runway hold line.

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Original NASA ASRS Text

Title: B757 MAINT CREW WHILE TAXIING FOR AN ENG TEST RUN HAS A RWY INCURSION AT LAS.

Narrative: WHILE TAXIING TO AN APPROVED ENG RUN AREA TO DO AN ENG RUN, I HAD PROBS WITH FINDING THE TXWY TURNOFFS DUE TO UNFAMILIARITY WITH THE TXWY SYS LAYOUT. I AM AN ACFT INSPECTOR FERRIED OUT OF ZZZ1. I HAD OVERRUN THE FIRST TURNOFF DUE TO MISUNDERSTANDING THE RADIO OPERATOR'S INSTRUCTIONS ASSUMING THE TURNOFF WAS THE FOLLOWING TXWY. AT THIS POINT I SHOULD HAVE ASKED FOR 'PROGRESSIVE TAXI INSTRUCTIONS' BUT WAS UNAWARE OF THE PROC AT THE TIME. THE TWR TRIED AGAIN TO MARSHALL ME TO THE RUN-UP AREA BUT AGAIN I MISSED THE SECOND TURNOFF AND HAD TO HOLD SHORT OF AN ACTIVE RWY. THIS OCCURRED AT PRIME MORNING LAUNCH TIME XA30 AM WHERE TFC IS HVY. I WAS INFORMED THAT I WAS NOSED OVER THE HOLD SHORT LINE AND THAT AN ACFT INCURSION HAD OCCURRED BY A LNDG ACFT. UPON RECEIVING THE PROGRESSIVE TAXI INSTRUCTIONS I WAS ABLE TO GET TO THE ENG RUN AREA AND COMPLETE THE TASK. FACTORS THAT LED TO THIS SIT WERE UNFAMILIARITY WITH THE ARPT, MISCOM WITH MY R SEAT RADIO MAN (WHO WAS THE LCL STATION MGR), THE RISING SUN ALSO MADE READING TXWY SIGNS DIFFICULT TO DECIPHER. ALTHOUGH QUALIFIED AND TRAINED IN TAXI PROCS IT IS NOT PART OF MY EVERY DAY DUTIES AND I OFTEN GO MONTHS WITHOUT TAXIING AN ACFT AND THEREFORE I AM NOT AS PROFICIENT AS I'D LIKE TO BE. THE RADIO MAN DID A GOOD JOB OF CALLING OUT TXWYS BUT NOT BEING FAMILIAR WITH THE ARPT, PROGRESSIVE TXWY INSTRUCTIONS WOULD HAVE WORKED BETTER. THERE WERE NO LCL MECHS AVAILABLE TO TAXI THE ACFT FOR ME, HENCE THE STATION MGR RIDING R SEAT FOR THE TAXI/ENG RUN. THERE WAS NO ACFT DAMAGED OR ACCIDENT OF ANY TYPE. THE INCURSION WAS CAUSED BY BEING NOSED OVER THE RWY HOLD LINE.

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.