Narrative:

We were returning after a 6 hour cold soak test flight -- the last flight in the post completion testing for the week. We had one more test to perform just before landing -- dropping the air driven generator. WX had not been good enough for us to do this at cps before this. The PF was very familiar with the procedure, but the PNF had only experienced the event once previously. The air driven generator drop was uneventful, but we had to work fast to get system back to 'normal' for the taxi to the ramp. PNF contacted ground, and told them we were going to the hangar. We received and acknowledged a clearance to taxi via txwys B and D, which did not cross an active runway. The mechanic sitting in the jumpseat told me it was hangar X, which I relayed to the ground controller. He changed the clearance to txwys B and G, hold short of runway 12L. I acknowledged the clearance and then showed the PF where taxiway G was on the taxi diagram. I went back to the job of recording all of our flight data from the test and trying to clean up after the air driven generator drop. My head was down and I did not look up again until the tower called us and asked for us to call them regarding a 'possible pilot deviation.' I realized we were on the ramp. I asked 'did we hold short of runway 12L?' the PF had not heard the clearance because he was further distraction by the mechanic. Both of the pilots are and have been participants in accident/incident investigations, and both of us have had extra training regarding runway incursions. This just goes to show it can happen to anyone, regardless of experience -- especially with unusually high workloads, abnormal conditions and cockpit distrs.

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Original NASA ASRS Text

Title: AFTER LNDG ON RWY 12R AT CPS, A CL604 CREW RECEIVED INSTRUCTIONS TO HOLD SHORT OF RWY 12L, BUT CROSSED.

Narrative: WE WERE RETURNING AFTER A 6 HR COLD SOAK TEST FLT -- THE LAST FLT IN THE POST COMPLETION TESTING FOR THE WEEK. WE HAD ONE MORE TEST TO PERFORM JUST BEFORE LNDG -- DROPPING THE ADG. WX HAD NOT BEEN GOOD ENOUGH FOR US TO DO THIS AT CPS BEFORE THIS. THE PF WAS VERY FAMILIAR WITH THE PROC, BUT THE PNF HAD ONLY EXPERIENCED THE EVENT ONCE PREVIOUSLY. THE ADG DROP WAS UNEVENTFUL, BUT WE HAD TO WORK FAST TO GET SYS BACK TO 'NORMAL' FOR THE TAXI TO THE RAMP. PNF CONTACTED GND, AND TOLD THEM WE WERE GOING TO THE HANGAR. WE RECEIVED AND ACKNOWLEDGED A CLRNC TO TAXI VIA TXWYS B AND D, WHICH DID NOT CROSS AN ACTIVE RWY. THE MECH SITTING IN THE JUMPSEAT TOLD ME IT WAS HANGAR X, WHICH I RELAYED TO THE GND CTLR. HE CHANGED THE CLRNC TO TXWYS B AND G, HOLD SHORT OF RWY 12L. I ACKNOWLEDGED THE CLRNC AND THEN SHOWED THE PF WHERE TXWY G WAS ON THE TAXI DIAGRAM. I WENT BACK TO THE JOB OF RECORDING ALL OF OUR FLT DATA FROM THE TEST AND TRYING TO CLEAN UP AFTER THE ADG DROP. MY HEAD WAS DOWN AND I DID NOT LOOK UP AGAIN UNTIL THE TWR CALLED US AND ASKED FOR US TO CALL THEM REGARDING A 'POSSIBLE PLTDEV.' I REALIZED WE WERE ON THE RAMP. I ASKED 'DID WE HOLD SHORT OF RWY 12L?' THE PF HAD NOT HEARD THE CLRNC BECAUSE HE WAS FURTHER DISTR BY THE MECH. BOTH OF THE PLTS ARE AND HAVE BEEN PARTICIPANTS IN ACCIDENT/INCIDENT INVESTIGATIONS, AND BOTH OF US HAVE HAD EXTRA TRAINING REGARDING RWY INCURSIONS. THIS JUST GOES TO SHOW IT CAN HAPPEN TO ANYONE, REGARDLESS OF EXPERIENCE -- ESPECIALLY WITH UNUSUALLY HIGH WORKLOADS, ABNORMAL CONDITIONS AND COCKPIT DISTRS.

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.