Narrative:

Monitored ATIS (126.75) at pou. Then spoke to ground for permission to taxi to the active runway. I received and acknowledged a hold short runway 33 on alpha taxiway. I taxied to the hold line and stopped the aircraft. I was wearing a radio headset. My instructor told me he had the airplane. I assumed he heard the ATIS and the exchange between ground control and me. I should have repeated ground instructions to him. I did not. I was reading the approach plate when I heard ground ask 'small aircraft X what are you doing?' when I looked up I saw that the instructor had taxied across runway 33 towards a runway we had taken off and landed on earlier in the day. He expected the same runway to be in use. Supplemental information from acn #86701: I watched small aircraft X come to a stop and hold short of runway 33. After a departure I was planning to coordinate a back taxi on 33. I told an mdt to taxi and hold short of runway 33. Seconds later I saw small aircraft X crossing runway 33 as small aircraft Y was aborting takeoff. Small aircraft Y pilot was the only one of us to see the incident in time to do anything about it.

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Original NASA ASRS Text

Title: SMA CROSSED ACTIVE RWY WITHOUT CLRNC FORCING AN ABORTED TKOF BY ANOTHER SMA.

Narrative: MONITORED ATIS (126.75) AT POU. THEN SPOKE TO GND FOR PERMISSION TO TAXI TO THE ACTIVE RWY. I RECEIVED AND ACKNOWLEDGED A HOLD SHORT RWY 33 ON ALPHA TAXIWAY. I TAXIED TO THE HOLD LINE AND STOPPED THE ACFT. I WAS WEARING A RADIO HEADSET. MY INSTRUCTOR TOLD ME HE HAD THE AIRPLANE. I ASSUMED HE HEARD THE ATIS AND THE EXCHANGE BETWEEN GND CTL AND ME. I SHOULD HAVE REPEATED GND INSTRUCTIONS TO HIM. I DID NOT. I WAS READING THE APCH PLATE WHEN I HEARD GND ASK 'SMA X WHAT ARE YOU DOING?' WHEN I LOOKED UP I SAW THAT THE INSTRUCTOR HAD TAXIED ACROSS RWY 33 TOWARDS A RWY WE HAD TAKEN OFF AND LANDED ON EARLIER IN THE DAY. HE EXPECTED THE SAME RWY TO BE IN USE. SUPPLEMENTAL INFORMATION FROM ACN #86701: I WATCHED SMA X COME TO A STOP AND HOLD SHORT OF RWY 33. AFTER A DEP I WAS PLANNING TO COORDINATE A BACK TAXI ON 33. I TOLD AN MDT TO TAXI AND HOLD SHORT OF RWY 33. SECONDS LATER I SAW SMA X XING RWY 33 AS SMA Y WAS ABORTING TAKEOFF. SMA Y PLT WAS THE ONLY ONE OF US TO SEE THE INCIDENT IN TIME TO DO ANYTHING ABOUT IT.

Data retrieved from NASA's ASRS site as of August 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.