Narrative:

I was giving flight instruction to a student in a cessna 150. We were communicating on the coe unicom frequency (122.8) during one taxi and were monitoring for other traffic during our run-up. After the run-up my student made the proper call announcing we would be departing on runway 19. I specifically double-checked that he was talking on 122.8 as he made his transmission. He was on the unicom frequency. We also heard a P-3 orion call in from the north saying he was inbound for runway 5. My student and I both looked around thoroughly before taxiing onto runway 19 and continued to do so as we took the runway. We began our takeoff roll and began climbing out over the runway. When we were about 1/3 down the runway, during our climb, I spotted another aircraft facing us, on the ground on runway 01. I called the aircraft out to my student and took control of the aircraft. I side stepped well to the side of the runway and continued our climb. As we passed the other aircraft he was not moving on the runway. I asked for the 'aircraft on the runway at coeur D'alene' and heard no reply. I did this again and the other aircraft replied and said he was 'deeply sorry' and stated that he radio had 'changed frequency on him.' I assured him we were well clear and he replied that he would taxi back and have his radio 'checked out.' we proceeded north to the practice area. A few minutes later I saw and heard the other aircraft announce his intentions and depart coe. During his climb-out I told him we were hearing him 'loud and clear now.' he stated that his radio was 'intermittent.' obviously the other aircraft was not on the unicom frequency and had made his transmission on some other frequency. We did everything possible to prevent a situation like this. Apparently the other aircraft taxied onto the opposite end sometime during our takeoff. If he had been on frequency this would not have happened, but luckily it was not ever close. This was definitely not a near miss. It could have easily been one though. In the future I will be even more careful when taxiing onto the runway. Also, having a tower at coe probably would have prevented this. Thanks for your forum for reporting. Also, the winds were light out of the south favoring runway 19. 19 is also the designated calm wind runway at coe. Callback conversation with the reporter revealed the following information: both the unicom and CTAF frequencies. Were working properly. Aircraft Y was not on the proper frequencies, if he was this incident could have been avoided.

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Original NASA ASRS Text

Title: ACFT X ON TKOF, TAKES EVASIVE ACTION TO AVOID ACFT Y ABOUT TO TKOF FROM THE OPPOSITE END OF RWY.

Narrative: I WAS GIVING FLT INSTRUCTION TO A STUDENT IN A CESSNA 150. WE WERE COMMUNICATING ON THE COE UNICOM FREQUENCY (122.8) DURING ONE TAXI AND WERE MONITORING FOR OTHER TRAFFIC DURING OUR RUN-UP. AFTER THE RUN-UP MY STUDENT MADE THE PROPER CALL ANNOUNCING WE WOULD BE DEPARTING ON RWY 19. I SPECIFICALLY DOUBLE-CHECKED THAT HE WAS TALKING ON 122.8 AS HE MADE HIS TRANSMISSION. HE WAS ON THE UNICOM FREQUENCY. WE ALSO HEARD A P-3 ORION CALL IN FROM THE N SAYING HE WAS INBOUND FOR RWY 5. MY STUDENT AND I BOTH LOOKED AROUND THOROUGHLY BEFORE TAXIING ONTO RWY 19 AND CONTINUED TO DO SO AS WE TOOK THE RWY. WE BEGAN OUR TKOF ROLL AND BEGAN CLIMBING OUT OVER THE RWY. WHEN WE WERE ABOUT 1/3 DOWN THE RWY, DURING OUR CLIMB, I SPOTTED ANOTHER ACFT FACING US, ON THE GROUND ON RWY 01. I CALLED THE ACFT OUT TO MY STUDENT AND TOOK CONTROL OF THE ACFT. I SIDE STEPPED WELL TO THE SIDE OF THE RWY AND CONTINUED OUR CLIMB. AS WE PASSED THE OTHER ACFT HE WAS NOT MOVING ON THE RWY. I ASKED FOR THE 'ACFT ON THE RWY AT COEUR D'ALENE' AND HEARD NO REPLY. I DID THIS AGAIN AND THE OTHER ACFT REPLIED AND SAID HE WAS 'DEEPLY SORRY' AND STATED THAT HE RADIO HAD 'CHANGED FREQUENCY ON HIM.' I ASSURED HIM WE WERE WELL CLEAR AND HE REPLIED THAT HE WOULD TAXI BACK AND HAVE HIS RADIO 'CHECKED OUT.' WE PROCEEDED N TO THE PRACTICE AREA. A FEW MINUTES LATER I SAW AND HEARD THE OTHER ACFT ANNOUNCE HIS INTENTIONS AND DEPART COE. DURING HIS CLIMB-OUT I TOLD HIM WE WERE HEARING HIM 'LOUD AND CLEAR NOW.' HE STATED THAT HIS RADIO WAS 'INTERMITTENT.' OBVIOUSLY THE OTHER ACFT WAS NOT ON THE UNICOM FREQUENCY AND HAD MADE HIS TRANSMISSION ON SOME OTHER FREQUENCY. WE DID EVERYTHING POSSIBLE TO PREVENT A SITUATION LIKE THIS. APPARENTLY THE OTHER ACFT TAXIED ONTO THE OPPOSITE END SOMETIME DURING OUR TKOF. IF HE HAD BEEN ON FREQUENCY THIS WOULD NOT HAVE HAPPENED, BUT LUCKILY IT WAS NOT EVER CLOSE. THIS WAS DEFINITELY NOT A NEAR MISS. IT COULD HAVE EASILY BEEN ONE THOUGH. IN THE FUTURE I WILL BE EVEN MORE CAREFUL WHEN TAXIING ONTO THE RWY. ALSO, HAVING A TOWER AT COE PROBABLY WOULD HAVE PREVENTED THIS. THANKS FOR YOUR FORUM FOR REPORTING. ALSO, THE WINDS WERE LIGHT OUT OF THE S FAVORING RWY 19. 19 IS ALSO THE DESIGNATED CALM WIND RWY AT COE. CALLBACK CONVERSATION WITH THE RPTR REVEALED THE FOLLOWING INFO: BOTH THE UNICOM AND CTAF FREQUENCIES. WERE WORKING PROPERLY. ACFT Y WAS NOT ON THE PROPER FREQUENCIES, IF HE WAS THIS INCIDENT COULD HAVE BEEN AVOIDED.

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.