Narrative:

I was in the trail aircraft of a flight of two. As the lead airplane called for taxi, I position my airplane behind the lead aircraft. At that time I thought I heard ATC give the following taxi clearance, '...aircraft Y taxi hold short of runway 30L at taxiway south.' lead started to taxi across taxiway H, took a right on taxiway G, and then a left on taxiway south, I followed. Lead continued toward runway 30L on taxiway south. As lead approached the hold short lines, I began to wonder if I had heard the clearance wrong. I looked down both ends of the runway and saw no traffic so I figured I had heard the clearance wrong and I continued to follow the lead aircraft. Holding short of runways 12L/30R ground called lead and asked if he was holding short of runway 30L. Lead replied that he was holding short of runway 12L. Contributing factors: early in the morning, dark, raining, and marginal visibility. Corrective action: for multi-ship operations establish an internal frequency, if there is any suspicion from any of the flight, advise the lead aircraft. Anytime a pilot is about to cross a runway and is not 100% sure, ask ATC before crossing. Because we taxi across the runways every morning and evening, (we) pilots must be aware of complacency. Supplemental information from acn 507469: I was the lead aircraft of a flight of two taxiing. I called ground control for taxi and thought he told me to hold short of runway 12L at taxiway south. I taxied across runway 30L and held short runway 12L. After a few seconds ground asked me if I was holding short runway 30L, I advised him I thought he said hold short runway 12L. He said 'negative, I said hold short runway 30L, you have crossed an active runway.' then I was told to call the tower. I believe a miscom between me and ground control and compounded by the decreasing WX as we started to taxi were the causes of the incursion. I believe I should have asked for clarification of the taxi instructions and a more alertness of second aircraft would have prevented the incursion.

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Original NASA ASRS Text

Title: C402 PLT HAD RWY INCURSION AT SAT.

Narrative: I WAS IN THE TRAIL ACFT OF A FLT OF TWO. AS THE LEAD AIRPLANE CALLED FOR TAXI, I POS MY AIRPLANE BEHIND THE LEAD ACFT. AT THAT TIME I THOUGHT I HEARD ATC GIVE THE FOLLOWING TAXI CLRNC, '...ACFT Y TAXI HOLD SHORT OF RWY 30L AT TXWY S.' LEAD STARTED TO TAXI ACROSS TXWY H, TOOK A R ON TXWY G, AND THEN A L ON TXWY S, I FOLLOWED. LEAD CONTINUED TOWARD RWY 30L ON TXWY S. AS LEAD APCHED THE HOLD SHORT LINES, I BEGAN TO WONDER IF I HAD HEARD THE CLRNC WRONG. I LOOKED DOWN BOTH ENDS OF THE RWY AND SAW NO TFC SO I FIGURED I HAD HEARD THE CLRNC WRONG AND I CONTINUED TO FOLLOW THE LEAD ACFT. HOLDING SHORT OF RWYS 12L/30R GND CALLED LEAD AND ASKED IF HE WAS HOLDING SHORT OF RWY 30L. LEAD REPLIED THAT HE WAS HOLDING SHORT OF RWY 12L. CONTRIBUTING FACTORS: EARLY IN THE MORNING, DARK, RAINING, AND MARGINAL VISIBILITY. CORRECTIVE ACTION: FOR MULTI-SHIP OPS ESTABLISH AN INTERNAL FREQ, IF THERE IS ANY SUSPICION FROM ANY OF THE FLT, ADVISE THE LEAD ACFT. ANYTIME A PLT IS ABOUT TO CROSS A RWY AND IS NOT 100% SURE, ASK ATC BEFORE XING. BECAUSE WE TAXI ACROSS THE RWYS EVERY MORNING AND EVENING, (WE) PLTS MUST BE AWARE OF COMPLACENCY. SUPPLEMENTAL INFO FROM ACN 507469: I WAS THE LEAD ACFT OF A FLT OF TWO TAXIING. I CALLED GND CTL FOR TAXI AND THOUGHT HE TOLD ME TO HOLD SHORT OF RWY 12L AT TXWY S. I TAXIED ACROSS RWY 30L AND HELD SHORT RWY 12L. AFTER A FEW SECONDS GND ASKED ME IF I WAS HOLDING SHORT RWY 30L, I ADVISED HIM I THOUGHT HE SAID HOLD SHORT RWY 12L. HE SAID 'NEGATIVE, I SAID HOLD SHORT RWY 30L, YOU HAVE CROSSED AN ACTIVE RWY.' THEN I WAS TOLD TO CALL THE TWR. I BELIEVE A MISCOM BTWN ME AND GND CTL AND COMPOUNDED BY THE DECREASING WX AS WE STARTED TO TAXI WERE THE CAUSES OF THE INCURSION. I BELIEVE I SHOULD HAVE ASKED FOR CLARIFICATION OF THE TAXI INSTRUCTIONS AND A MORE ALERTNESS OF SECOND ACFT WOULD HAVE PREVENTED THE INCURSION.

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.