Narrative:

During a maintenance taxi of aircraft; after pushback; were cleared to taxi on taxiway K; hold short of taxiway C. Prior to reaching taxiway C; ground control said to turn right on taxiway C; hold short of runway 22R. We turned and crossed runway 22R and held short of runway 22L. This is clearly verified by tower rape of radio. I thought they cleared us to cross runway 22R and hold runway 22L. This caused the incursion. We were held between runway 22R and runway 22L until an escort truck came and finished the taxi to the run-up area. After maintenance run; we started back with escort truck leading the way -- cleared to taxi via runway 33L hold short runway 27. The escort truck crossed runway 27 and continued. We held. There was some conversation between the tower and escort truck as to why we didn't follow. This caused an inbound flight to do a go around. The first incursion we both evidently heard or mixed left's and right's wrong. The second was lack of proper communication between tower; truck; and us.

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Original NASA ASRS Text

Title: AN A300 MAINT TAXI CONFUSED HOLD SHORT OF RWY 22R AND CROSSED IT TO HOLD SHORT OF RWY 22L. ON RETURN FROM MAINT RUN; A HOLD SHORT OF RWY 27 CAUSED A GAR.

Narrative: DURING A MAINT TAXI OF ACFT; AFTER PUSHBACK; WERE CLRED TO TAXI ON TXWY K; HOLD SHORT OF TXWY C. PRIOR TO REACHING TXWY C; GND CTL SAID TO TURN R ON TXWY C; HOLD SHORT OF RWY 22R. WE TURNED AND CROSSED RWY 22R AND HELD SHORT OF RWY 22L. THIS IS CLRLY VERIFIED BY TWR RAPE OF RADIO. I THOUGHT THEY CLRED US TO CROSS RWY 22R AND HOLD RWY 22L. THIS CAUSED THE INCURSION. WE WERE HELD BTWN RWY 22R AND RWY 22L UNTIL AN ESCORT TRUCK CAME AND FINISHED THE TAXI TO THE RUN-UP AREA. AFTER MAINT RUN; WE STARTED BACK WITH ESCORT TRUCK LEADING THE WAY -- CLRED TO TAXI VIA RWY 33L HOLD SHORT RWY 27. THE ESCORT TRUCK CROSSED RWY 27 AND CONTINUED. WE HELD. THERE WAS SOME CONVERSATION BTWN THE TWR AND ESCORT TRUCK AS TO WHY WE DIDN'T FOLLOW. THIS CAUSED AN INBOUND FLT TO DO A GAR. THE FIRST INCURSION WE BOTH EVIDENTLY HEARD OR MIXED L'S AND R'S WRONG. THE SECOND WAS LACK OF PROPER COM BTWN TWR; TRUCK; AND US.

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