AN AIR AMBULANCE PLT HAD A RWY INCURSION WHILE AN ACR DC9 WAS ON TKOF. THE ATCT LCL CTLR USED THE WRONG CALL SIGN WHEN ORDERING THE ACR TO REJECT SO HE CONTINUED HIS TKOF ROLL AND CLBED OVER THE AIR AMBULANCE. C414; DC9.

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ON NOV/XX/96; AT APPROX XA03 EST; I COMMITTED A RWY INCURSION AT ATLANTA'S HARTSFIELD INTL ARPT BY FAILING TO STOP AT THE RWY 8R HOLD SHORT LINE WHILE TAXIING SBOUND ON TXWY D. AN ACR MD80 HAD JUST BEGUN ITS TKOF ROLL WHEN ATLANTA GND CALLED ORDERING ME TO EITHER STOP IMMEDIATELY OR EXPEDITE ON ACROSS RWY 8R. I CHOSE TO STOP; AND WHILE PARTIALLY ON RWY 8R EXECUTED A 180 DEG TURN AND GO BACK TO THE N OF THE INTXN OF TXWY D AND RWY 8R. I TURNED MY ACFT TO THE E ON THE TXWY TO MINIMIZE ANY TAIL EXPOSURE. THE DISTANCE FROM THE DEP END OF RWY 8R TO THE INTXN OF TXWY D IS APPROX 5000 FT. APPROX 10-15 SECONDS LATER; THE MD80 PASSED OVERHEAD IN ITS CLBOUT AT AN ALT OF APPROX 300-500 FT. FOLLOWING RECEIPT OF AN IFR CLRNC FROM ATLANTA TO ST PETERSBURG; I CONTACTED ATLANTA GND FOR TAXI CLRNC WHILE AT GA PARKING. THE CLRNC WAS TO TAXI VIA TXWY D TO RWY 9L; CLRED TO CROSS RWY 8L AND HOLD SHORT RWY 8R. SOMEHOW; IN MY MIND I THOUGHT I WAS CLRED TO RWY 9L AFTER XING RWY 8L; EVEN THOUGH I HAD READ BACK THE CLRNC CORRECTLY; WHICH IN FACT DID REQUIRE ME TO HOLD SHORT OF RWY 8R. AFTER MUCH REFLECTION; I CONCLUDE THAT THIS INCIDENT (RWY INCURSION) WAS THE RESULT OF HUMAN ERROR. SOMEHOW; I WAS THINKING OF RWY 9L AS I WAS TAXIING; EVEN THOUGH I HAD READ BACK 'HOLD SHORT RWY 8R.' IN MY OPINION; THERE WERE NO MAJOR CONTRIBUTING FACTORS TO THIS INCIDENT. MINOR CONTRIBUTING FACTORS WOULD INCLUDE: RELATIVE UNFAMILIARITY WITH THIS ARPT; LIGHT RAIN SOMEWHAT IMPAIRED VISIBILITY OUT OF THE WINDSHIELD; AND THE SENSE OF URGENCY TO KEEP THE SPD UP WHILE TAXIING. THERE SIMPLY IS NO ACCEPTABLE EXCUSE FOR MY FAILURE TO COME TO A COMPLETE STOP AT THE HOLD SHORT LINE ON TXWY D AT RWY 8R. TO HELP PREVENT A REPEAT OF THIS INCIDENT; I BELIEVE IT WOULD BE HELPFUL TO COPY THE TAXI CLRNC; IN SOME FORM OF SHORTHAND; ESPECIALLY AT UNFAMILIAR ARPTS. ADVISING THE GND CTLR OF THE PLT'S RELATIVE UNFAMILIARITY OF THE ARPT WOULD ALERT THAT CTLR TO KEEP A CLOSER WATCH OF THE PARTICULAR ACFT.