Narrative:

While waiting for clearance to depart runway 2R at pdk, the controller cleared us (my instrument student and me) to hold short runway 2R. Because of the volume of traffic waiting to depart (7 aircraft) and land, my student mistook the instructions for 'taxi into position and hold 2R.' as a result, power was given and the airplane rolled past the hold line, but well short of the active runway. I applied brakes and held the airplane in position until clearance was given to depart. The situation was caused primarily by the very hectic atmosphere at pdk at the time. Traffic was very heavy. From the time of our start up to our departure, over 1 hour had elapsed. The controller was very competent in handling traffic, but as a pilot, I had to pay strict attention to the controller so I could receive all clrncs and communication. The airport volume was new to my student, therefore, I handled the radio and relayed the instruction to him. At the time of the incident the controller did clear us to hold short, to which I replied 'identify, holding short 2R.' after we crossed the line, the controller never questioned our intentions, but I called back for confirmation of the 'hold short' instructions and was indeed instructed to hold short. No further complications arose, but a potential deadly scenario could have transpired with landing traffic. The problem was not airport markings, but communication between my student, the tower, and myself. After the flight, I questioned my student about what he perceived the problem to be. He told me he heard the controller clear them to taxi into position. I reemphasized the care and importance of listening, waiting down, and repeating instructions.

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Original NASA ASRS Text

Title: INSTRUCTOR WITH INST STUDENT CROSSES HOLD LINE WHEN INSTRUCTED TO HOLD SHORT.

Narrative: WHILE WAITING FOR CLRNC TO DEPART RWY 2R AT PDK, THE CTLR CLRED US (MY INST STUDENT AND ME) TO HOLD SHORT RWY 2R. BECAUSE OF THE VOLUME OF TFC WAITING TO DEPART (7 ACFT) AND LAND, MY STUDENT MISTOOK THE INSTRUCTIONS FOR 'TAXI INTO POS AND HOLD 2R.' AS A RESULT, PWR WAS GIVEN AND THE AIRPLANE ROLLED PAST THE HOLD LINE, BUT WELL SHORT OF THE ACTIVE RWY. I APPLIED BRAKES AND HELD THE AIRPLANE IN POS UNTIL CLRNC WAS GIVEN TO DEPART. THE SITUATION WAS CAUSED PRIMARILY BY THE VERY HECTIC ATMOSPHERE AT PDK AT THE TIME. TFC WAS VERY HVY. FROM THE TIME OF OUR START UP TO OUR DEP, OVER 1 HR HAD ELAPSED. THE CTLR WAS VERY COMPETENT IN HANDLING TFC, BUT AS A PLT, I HAD TO PAY STRICT ATTN TO THE CTLR SO I COULD RECEIVE ALL CLRNCS AND COM. THE ARPT VOLUME WAS NEW TO MY STUDENT, THEREFORE, I HANDLED THE RADIO AND RELAYED THE INSTRUCTION TO HIM. AT THE TIME OF THE INCIDENT THE CTLR DID CLR US TO HOLD SHORT, TO WHICH I REPLIED 'IDENT, HOLDING SHORT 2R.' AFTER WE CROSSED THE LINE, THE CTLR NEVER QUESTIONED OUR INTENTIONS, BUT I CALLED BACK FOR CONFIRMATION OF THE 'HOLD SHORT' INSTRUCTIONS AND WAS INDEED INSTRUCTED TO HOLD SHORT. NO FURTHER COMPLICATIONS AROSE, BUT A POTENTIAL DEADLY SCENARIO COULD HAVE TRANSPIRED WITH LNDG TFC. THE PROBLEM WAS NOT ARPT MARKINGS, BUT COM BTWN MY STUDENT, THE TWR, AND MYSELF. AFTER THE FLT, I QUESTIONED MY STUDENT ABOUT WHAT HE PERCEIVED THE PROBLEM TO BE. HE TOLD ME HE HEARD THE CTLR CLR THEM TO TAXI INTO POS. I REEMPHASIZED THE CARE AND IMPORTANCE OF LISTENING, WAITING DOWN, AND REPEATING INSTRUCTIONS.

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.