Narrative:

In a G1000 equipped da-40 on the west ramp. My student listened to taxi instructions and read them back. I thought I heard the instructions as taxi to runway xx via txwys E6 and east; hold short of runway Y. My student talked on the radio. Apparently the instruction was to hold short of runway xx at taxiway E6. The conversation was interrupted several times by the onboard traffic alerting system; giving us traffic advisories even though we were motionless on the ground. Due to the interruptions I attempted to silence the warnings through the G1000 system and continued to do so while my student taxied. These were not the usual taxi instructions. Usually from the west ramp a taxi via taxiway F is issued. This day the instructions were to take us across the departure end of runway xx. Both runways were being used this day. There are two exits from the west ramp. To our right was taxiway F and to our left was taxiway E6 which crosses the departure end of runway xx. As we proceeded up to the hold short line we heard an instruction to a maintenance tug to hold short of runway xx. He was on the other side. Prior to attempting to cross I looked down the departure end of the runway and saw an aircraft at approximately 300-400 ft that had just taken off. Thinking that the maintenance tug was being told to hold short so we could cross I agreed with my student that we could cross. Just after passing the hold short line we heard an instruction from ground telling us to stop. We stopped and I held the brakes as well. We were stopped for about a minute just past the hold short line but before the runway edge line. From this point I could see another aircraft approximately one quarter mile from the approach end of runway xx that went around. After the aircraft went around ground control instructed us to cross runway xx to taxiway east make a right onto taxiway east and taxi to runway xx. At the end of taxiway east we received an instruction from ground control to call the tower for a possible deviation. After taking down the number we were cleared for takeoff. I believe what really caused the problem was our failure to adhere to the taxi instructions. I believe a contributing factor was the audio alert coming from the G1000 system on our da-40 drowning out the radio. While still listening to the taxi instructions the system gave us traffic warnings with locations and altitudes at least six times. I attempted to turn the audio alerts off but was unable to find a means on any menu in the G1000. I was also unable to find any volume control for the alerts either in the poh or in the G1000 cockpit reference guide. Through process of elimination during the flight I pulled the TAS circuit breaker on the da-40 and we had no further problems. We also had no traffic alerts. The system does not shut down while on the ground and continues to give audio alerts. To prevent a recurrence in the future I will request clarification of any taxi instruction that gets stepped on by any other audio and while on the ground the TAS circuit breaker will be pulled. Also I will hold short of any runway I am not absolutely positive I can cross and request clarification from ATC.callback conversation with reporter revealed the following information: although the student may have been aware of the clearance to hold short of runway xx; he deferred to the instructor's indications that they were cleared to cross. The audio traffic alerts were a hindrance and a circuit breaker is now being used to silence them on the ground. The constant alerts are also a problem in the traffic pattern and there should be a way of silencing the alerts while still keeping the traffic display.

Google
 

Original NASA ASRS Text

Title: DA40 INSTRUCTOR AND STUDENT REPORT RWY INCURSION AT ZZZ. RPTR CLAIMS THAT INTRUSIVE TRAFFIC ALERTS BY G1000 ARE AN ISSUE IN THE INCIDENT.

Narrative: IN A G1000 EQUIPPED DA-40 ON THE WEST RAMP. MY STUDENT LISTENED TO TAXI INSTRUCTIONS AND READ THEM BACK. I THOUGHT I HEARD THE INSTRUCTIONS AS TAXI TO RWY XX VIA TXWYS E6 AND E; HOLD SHORT OF RWY Y. MY STUDENT TALKED ON THE RADIO. APPARENTLY THE INSTRUCTION WAS TO HOLD SHORT OF RUNWAY XX AT TXWY E6. THE CONVERSATION WAS INTERRUPTED SEVERAL TIMES BY THE ONBOARD TRAFFIC ALERTING SYSTEM; GIVING US TRAFFIC ADVISORIES EVEN THOUGH WE WERE MOTIONLESS ON THE GROUND. DUE TO THE INTERRUPTIONS I ATTEMPTED TO SILENCE THE WARNINGS THROUGH THE G1000 SYSTEM AND CONTINUED TO DO SO WHILE MY STUDENT TAXIED. THESE WERE NOT THE USUAL TAXI INSTRUCTIONS. USUALLY FROM THE WEST RAMP A TAXI VIA TXWY F IS ISSUED. THIS DAY THE INSTRUCTIONS WERE TO TAKE US ACROSS THE DEPARTURE END OF RWY XX. BOTH RUNWAYS WERE BEING USED THIS DAY. THERE ARE TWO EXITS FROM THE WEST RAMP. TO OUR RIGHT WAS TXWY F AND TO OUR LEFT WAS TXWY E6 WHICH CROSSES THE DEPARTURE END OF RWY XX. AS WE PROCEEDED UP TO THE HOLD SHORT LINE WE HEARD AN INSTRUCTION TO A MAINTENANCE TUG TO HOLD SHORT OF RWY XX. HE WAS ON THE OTHER SIDE. PRIOR TO ATTEMPTING TO CROSS I LOOKED DOWN THE DEPARTURE END OF THE RUNWAY AND SAW AN AIRCRAFT AT APPROXIMATELY 300-400 FT THAT HAD JUST TAKEN OFF. THINKING THAT THE MAINTENANCE TUG WAS BEING TOLD TO HOLD SHORT SO WE COULD CROSS I AGREED WITH MY STUDENT THAT WE COULD CROSS. JUST AFTER PASSING THE HOLD SHORT LINE WE HEARD AN INSTRUCTION FROM GROUND TELLING US TO STOP. WE STOPPED AND I HELD THE BRAKES AS WELL. WE WERE STOPPED FOR ABOUT A MINUTE JUST PAST THE HOLD SHORT LINE BUT BEFORE THE RUNWAY EDGE LINE. FROM THIS POINT I COULD SEE ANOTHER AIRCRAFT APPROXIMATELY ONE QUARTER MILE FROM THE APPROACH END OF RWY XX THAT WENT AROUND. AFTER THE AIRCRAFT WENT AROUND GROUND CONTROL INSTRUCTED US TO CROSS RWY XX TO TXWY E MAKE A RIGHT ONTO TXWY E AND TAXI TO RWY XX. AT THE END OF TXWY E WE RECEIVED AN INSTRUCTION FROM GROUND CONTROL TO CALL THE TOWER FOR A POSSIBLE DEVIATION. AFTER TAKING DOWN THE NUMBER WE WERE CLEARED FOR TAKEOFF. I BELIEVE WHAT REALLY CAUSED THE PROBLEM WAS OUR FAILURE TO ADHERE TO THE TAXI INSTRUCTIONS. I BELIEVE A CONTRIBUTING FACTOR WAS THE AUDIO ALERT COMING FROM THE G1000 SYSTEM ON OUR DA-40 DROWNING OUT THE RADIO. WHILE STILL LISTENING TO THE TAXI INSTRUCTIONS THE SYSTEM GAVE US TRAFFIC WARNINGS WITH LOCATIONS AND ALTITUDES AT LEAST SIX TIMES. I ATTEMPTED TO TURN THE AUDIO ALERTS OFF BUT WAS UNABLE TO FIND A MEANS ON ANY MENU IN THE G1000. I WAS ALSO UNABLE TO FIND ANY VOLUME CONTROL FOR THE ALERTS EITHER IN THE POH OR IN THE G1000 COCKPIT REFERENCE GUIDE. THROUGH PROCESS OF ELIMINATION DURING THE FLIGHT I PULLED THE TAS CIRCUIT BREAKER ON THE DA-40 AND WE HAD NO FURTHER PROBLEMS. WE ALSO HAD NO TRAFFIC ALERTS. THE SYSTEM DOES NOT SHUT DOWN WHILE ON THE GROUND AND CONTINUES TO GIVE AUDIO ALERTS. TO PREVENT A RECURRENCE IN THE FUTURE I WILL REQUEST CLARIFICATION OF ANY TAXI INSTRUCTION THAT GETS STEPPED ON BY ANY OTHER AUDIO AND WHILE ON THE GROUND THE TAS CIRCUIT BREAKER WILL BE PULLED. ALSO I WILL HOLD SHORT OF ANY RUNWAY I AM NOT ABSOLUTELY POSITIVE I CAN CROSS AND REQUEST CLARIFICATION FROM ATC.CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: ALTHOUGH THE STUDENT MAY HAVE BEEN AWARE OF THE CLEARANCE TO HOLD SHORT OF RWY XX; HE DEFERRED TO THE INSTRUCTOR'S INDICATIONS THAT THEY WERE CLEARED TO CROSS. THE AUDIO TRAFFIC ALERTS WERE A HINDRANCE AND A CIRCUIT BREAKER IS NOW BEING USED TO SILENCE THEM ON THE GROUND. THE CONSTANT ALERTS ARE ALSO A PROBLEM IN THE TRAFFIC PATTERN AND THERE SHOULD BE A WAY OF SILENCING THE ALERTS WHILE STILL KEEPING THE TRAFFIC DISPLAY.

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