Narrative:

I was instructing a student pilot/owner in an M20C. We were instructed to depart runway 27R and enter a left traffic pattern for runway 27R to practice touch-and-goes. We departed and began our climb to pattern altitude. At 400 ft AGL, we inadvertently began a right turn towards runway 27R. I was momentarily confused as to how to enter the proper pattern for l-hand turns for runway 27R. I then decided that the proper way was to fly a left crosswind for runway 27L, left downwind on runway 27L and wait for clearance to begin an extended left base for runway 27L. I quickly began an immediate left turn to heading of 180 degrees to enter the left crosswind, as originally instructed. I did not properly brief or fly (as a CFI) the given ATC instruction. This type of ATC clearance is to be fully understood before acceptance and if misunderstood, the best option is not to depart or if airborne, to continue a straight-out departure on runway heading. As a CFI at a class D airport with parallel runways, I should instruct my students on these ATC clrncs as part of my instruction given on airport operations. I debriefed the student upon completion of our lesson and used it as a learning example on following and understanding ATC clrncs. I am embarrassed by setting a poor example as a CFI and have completed a personal self review in the aim on such topics to ensure it does not occur again.

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Original NASA ASRS Text

Title: HDG TRACK DEV ON TKOF DEP PROC DURING AN M20C TRAINING FLT AT CMH, OH.

Narrative: I WAS INSTRUCTING A STUDENT PLT/OWNER IN AN M20C. WE WERE INSTRUCTED TO DEPART RWY 27R AND ENTER A L TFC PATTERN FOR RWY 27R TO PRACTICE TOUCH-AND-GOES. WE DEPARTED AND BEGAN OUR CLB TO PATTERN ALT. AT 400 FT AGL, WE INADVERTENTLY BEGAN A R TURN TOWARDS RWY 27R. I WAS MOMENTARILY CONFUSED AS TO HOW TO ENTER THE PROPER PATTERN FOR L-HAND TURNS FOR RWY 27R. I THEN DECIDED THAT THE PROPER WAY WAS TO FLY A L XWIND FOR RWY 27L, L DOWNWIND ON RWY 27L AND WAIT FOR CLRNC TO BEGIN AN EXTENDED L BASE FOR RWY 27L. I QUICKLY BEGAN AN IMMEDIATE L TURN TO HDG OF 180 DEGS TO ENTER THE L XWIND, AS ORIGINALLY INSTRUCTED. I DID NOT PROPERLY BRIEF OR FLY (AS A CFI) THE GIVEN ATC INSTRUCTION. THIS TYPE OF ATC CLRNC IS TO BE FULLY UNDERSTOOD BEFORE ACCEPTANCE AND IF MISUNDERSTOOD, THE BEST OPTION IS NOT TO DEPART OR IF AIRBORNE, TO CONTINUE A STRAIGHT-OUT DEP ON RWY HDG. AS A CFI AT A CLASS D ARPT WITH PARALLEL RWYS, I SHOULD INSTRUCT MY STUDENTS ON THESE ATC CLRNCS AS PART OF MY INSTRUCTION GIVEN ON ARPT OPS. I DEBRIEFED THE STUDENT UPON COMPLETION OF OUR LESSON AND USED IT AS A LEARNING EXAMPLE ON FOLLOWING AND UNDERSTANDING ATC CLRNCS. I AM EMBARRASSED BY SETTING A POOR EXAMPLE AS A CFI AND HAVE COMPLETED A PERSONAL SELF REVIEW IN THE AIM ON SUCH TOPICS TO ENSURE IT DOES NOT OCCUR AGAIN.

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.