Narrative:

The problem began with the APU not running and the xbleed process unsuccessful. The wheels up time was running out and on-time performance pressure for release to ZZZ. The tower asking 2 or 3 times if we were ready; cleared us to taxi onto runway 20 and hold short of runway 29. The tower told us to stop and that we did not hold short of runway 29. The tower advised that we had not held short of runway 29. The runway markings are confusing and ambiguous at the intersection of runway 20 and runway 29. We landed on runway 29 earlier and the runway looks like a displaced threshold; so when I was taxiing onto runway 20 I could see what looked like a hold short line for runway 29. The runway 29 markings looked to be 50+ yards away from runway 20. 45 mins late taxiing out for takeoff due to swapping aircraft for maintenance. Started both engines and shut down the APU (every min counts); and finished the before takeoff checklist. Then switching to the tower; where we were told of a delay of about 15 mins; we shut down the left engine to save on fuel. Tower told us to start engine at 50 mins past the hour with wheels up time of 54 void time after 56. We requested a xbleed start which was unsuccessful. Powered the APU and used it to start engine #1. Simultaneously; tower is asking if we were ready to go; at which time I informed them of additional time needed to warm up the engine. The first officer was doing the after start checklist when the tower informed another nearby aircraft that was ready for takeoff on runway 29 to hold short; as they were going to get us off first. The tower then gave our instruction to taxi onto runway 20 and hold short of runway 29 (advising us again of our wheels up time). The first officer read back the exact instructions. With all of the 'rush' activity; I interpreted the instructions to be taxi into position and hold; and I started taxiing on runway 20 slowly approaching the end of runway 29 (allowing engines to continue to warm up) when the tower said to stop. I held my position heading straight down runway 20; having not yet made the 90 degree turn onto runway 29. After the tower told us to stop; I asked if he needed us to continue down runway 20 which he replied no traffic for runway 29; no problem to stay at our present position. Then he asked if we were ready (the first officer told me the timing on the engine was fine) and I said we were ready. The tower then cleared us for takeoff.

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Original NASA ASRS Text

Title: MDT FLT CREW EXPERIENCES POSSIBLE RWY INCURSION.

Narrative: THE PROB BEGAN WITH THE APU NOT RUNNING AND THE XBLEED PROCESS UNSUCCESSFUL. THE WHEELS UP TIME WAS RUNNING OUT AND ON-TIME PERFORMANCE PRESSURE FOR RELEASE TO ZZZ. THE TWR ASKING 2 OR 3 TIMES IF WE WERE READY; CLRED US TO TAXI ONTO RWY 20 AND HOLD SHORT OF RWY 29. THE TWR TOLD US TO STOP AND THAT WE DID NOT HOLD SHORT OF RWY 29. THE TWR ADVISED THAT WE HAD NOT HELD SHORT OF RWY 29. THE RWY MARKINGS ARE CONFUSING AND AMBIGUOUS AT THE INTXN OF RWY 20 AND RWY 29. WE LANDED ON RWY 29 EARLIER AND THE RWY LOOKS LIKE A DISPLACED THRESHOLD; SO WHEN I WAS TAXIING ONTO RWY 20 I COULD SEE WHAT LOOKED LIKE A HOLD SHORT LINE FOR RWY 29. THE RWY 29 MARKINGS LOOKED TO BE 50+ YARDS AWAY FROM RWY 20. 45 MINS LATE TAXIING OUT FOR TKOF DUE TO SWAPPING ACFT FOR MAINT. STARTED BOTH ENGS AND SHUT DOWN THE APU (EVERY MIN COUNTS); AND FINISHED THE BEFORE TKOF CHKLIST. THEN SWITCHING TO THE TWR; WHERE WE WERE TOLD OF A DELAY OF ABOUT 15 MINS; WE SHUT DOWN THE L ENG TO SAVE ON FUEL. TWR TOLD US TO START ENG AT 50 MINS PAST THE HR WITH WHEELS UP TIME OF 54 VOID TIME AFTER 56. WE REQUESTED A XBLEED START WHICH WAS UNSUCCESSFUL. POWERED THE APU AND USED IT TO START ENG #1. SIMULTANEOUSLY; TWR IS ASKING IF WE WERE READY TO GO; AT WHICH TIME I INFORMED THEM OF ADDITIONAL TIME NEEDED TO WARM UP THE ENG. THE FO WAS DOING THE AFTER START CHKLIST WHEN THE TWR INFORMED ANOTHER NEARBY ACFT THAT WAS READY FOR TKOF ON RWY 29 TO HOLD SHORT; AS THEY WERE GOING TO GET US OFF FIRST. THE TWR THEN GAVE OUR INSTRUCTION TO TAXI ONTO RWY 20 AND HOLD SHORT OF RWY 29 (ADVISING US AGAIN OF OUR WHEELS UP TIME). THE FO READ BACK THE EXACT INSTRUCTIONS. WITH ALL OF THE 'RUSH' ACTIVITY; I INTERPED THE INSTRUCTIONS TO BE TAXI INTO POS AND HOLD; AND I STARTED TAXIING ON RWY 20 SLOWLY APCHING THE END OF RWY 29 (ALLOWING ENGS TO CONTINUE TO WARM UP) WHEN THE TWR SAID TO STOP. I HELD MY POS HEADING STRAIGHT DOWN RWY 20; HAVING NOT YET MADE THE 90 DEG TURN ONTO RWY 29. AFTER THE TWR TOLD US TO STOP; I ASKED IF HE NEEDED US TO CONTINUE DOWN RWY 20 WHICH HE REPLIED NO TFC FOR RWY 29; NO PROB TO STAY AT OUR PRESENT POS. THEN HE ASKED IF WE WERE READY (THE FO TOLD ME THE TIMING ON THE ENG WAS FINE) AND I SAID WE WERE READY. THE TWR THEN CLRED US FOR TKOF.

Data retrieved from NASA's ASRS site as of May 2009 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.