Narrative:

After engine start, we (my student and I) received clearance to taxi from FBO to runway 9R via taxiway charlie and do our run- up on charlie prior to taxiway alpha. In an effort to save time for the long taxi, I assumed taxi responsibility while I instructed student pilot (with less than 8 hours) to follow the checklist. When our taxi clearance was issued, runway 4 was not active. The student inadvertently switched to tower frequency while doing the checklist. Because I was focused on the taxi, I failed to realize the change in frequency. At this time we had crossed runway 4. I immediately switched to ground and discovered they had tried to contact me to hold short runway 4. We missed ground control's verbal and light gun signals to stop. After a stern request from ground control to 'listen up,' I apologized and verified if damage was done? This problem could have been avoided if I had not become so engrossed in taxiing to save time. I didn't monitor my student because he as (I assumed) alert and cautious. The moral being don't take your student for granted. Monitor their procedures and correct errors. In this case, no outright damage was done, however, by trying to save time, greater damage could result. Therefore no short-cuts. Also upon crossing runway 4, I visually cleared the runway, even though final was clear it was none-the-less an active runway. As an instructor I'm responsible for many acts, by working outside the standard procedures an error was made. Therefore my recommendation: be vigilant and aware of the surrounding and follow procedures.

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Original NASA ASRS Text

Title: TRAINING SMA SEL UNAUTH XING OF AN ACTIVE RWY DURING TAXI FOR TKOF.

Narrative: AFTER ENG START, WE (MY STUDENT AND I) RECEIVED CLRNC TO TAXI FROM FBO TO RWY 9R VIA TXWY CHARLIE AND DO OUR RUN- UP ON CHARLIE PRIOR TO TXWY ALPHA. IN AN EFFORT TO SAVE TIME FOR THE LONG TAXI, I ASSUMED TAXI RESPONSIBILITY WHILE I INSTRUCTED STUDENT PLT (WITH LESS THAN 8 HRS) TO FOLLOW THE CHKLIST. WHEN OUR TAXI CLRNC WAS ISSUED, RWY 4 WAS NOT ACTIVE. THE STUDENT INADVERTENTLY SWITCHED TO TWR FREQ WHILE DOING THE CHKLIST. BECAUSE I WAS FOCUSED ON THE TAXI, I FAILED TO REALIZE THE CHANGE IN FREQ. AT THIS TIME WE HAD CROSSED RWY 4. I IMMEDIATELY SWITCHED TO GND AND DISCOVERED THEY HAD TRIED TO CONTACT ME TO HOLD SHORT RWY 4. WE MISSED GND CTL'S VERBAL AND LIGHT GUN SIGNALS TO STOP. AFTER A STERN REQUEST FROM GND CTL TO 'LISTEN UP,' I APOLOGIZED AND VERIFIED IF DAMAGE WAS DONE? THIS PROB COULD HAVE BEEN AVOIDED IF I HAD NOT BECOME SO ENGROSSED IN TAXIING TO SAVE TIME. I DIDN'T MONITOR MY STUDENT BECAUSE HE AS (I ASSUMED) ALERT AND CAUTIOUS. THE MORAL BEING DON'T TAKE YOUR STUDENT FOR GRANTED. MONITOR THEIR PROCS AND CORRECT ERRORS. IN THIS CASE, NO OUTRIGHT DAMAGE WAS DONE, HOWEVER, BY TRYING TO SAVE TIME, GREATER DAMAGE COULD RESULT. THEREFORE NO SHORT-CUTS. ALSO UPON XING RWY 4, I VISUALLY CLRED THE RWY, EVEN THOUGH FINAL WAS CLR IT WAS NONE-THE-LESS AN ACTIVE RWY. AS AN INSTRUCTOR I'M RESPONSIBLE FOR MANY ACTS, BY WORKING OUTSIDE THE STANDARD PROCS AN ERROR WAS MADE. THEREFORE MY RECOMMENDATION: BE VIGILANT AND AWARE OF THE SURROUNDING AND FOLLOW PROCS.

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.