PENETRATION OF CLASS B AIRSPACE DURING TRAINING FLT IN A C172.

Narrative

DURING 2 CONSECUTIVE TRAINING FLTS WITH PRIORITY STUDENTS; IT IS POSSIBLE THAT I INADVERTENTLY ENTERED A PORTION OF CLASS B AIRSPACE THAT EXTENDS FROM 8000 FT TO 12000 FT MSL. AS A NEW INSTRUCTOR; THIS WAS MY INITIAL EXPERIENCE INTRODUCING PRIMARY STUDENTS TO PWR-OFF AND PWR-ON STALLS. I FELT SOME ANXIETY REGARDING THEIR REACTIONS AND SENSED THEY WERE APPREHENSIVE ALSO. I ELECTED TO BEGIN THESE EXERCISES AT 8500 FT MSL (3500 FT AGL) TO PROVIDE A LARGER MARGIN OF SAFETY IN THE EVENT OF AN INADVERTENT SPIN. ALTHOUGH THERE WAS RELATIVELY LITTLE TURB IN THE PRACTICE AREA; I ALSO DECIDED TO PERFORM THESE MANEUVERS E OF I-25 WHERE THE AIR WAS COMPLETELY SMOOTH. MOST MANEUVERING WAS PERFORMED IN CLASS E AIRSPACE NW OF THE OUTER LATERAL LIMITS OF CLASS B AIRSPACE; AND ALSO IN AIRSPACE UNDERLYING CLASS B AIRSPACE HAVING A FLOOR OF 10000 FT MSL. HOWEVER; UPON REVIEWING THESE FLTS THE FOLLOWING DAY AND CONSULTING THE DEN TERMINAL AREA CHART; I BECAME CONCERNED THAT WE MIGHT HAVE PERFORMED SOME MANEUVERS IN THAT PORTION OF CLASS E AIRSPACE SW OF GREELEY THAT UNDERLIES CLASS B AIRSPACE HAVING A FLOOR OF 8000 FT MSL. ALTHOUGH I HAD THE APPROPRIATE CHARTS WITH ME; I DID NOT CONSULT THEM DURING THIS PHASE OF FLT. AT NO TIME DID I EXCEED 8500 FT MSL. I BELIEVE MY INATTN TO THE CLASS B AIRSPACE LIMITS WAS THE RESULT OF: 1) MY RELATIVE INEXPERIENCE AS AN INSTRUCTOR AND; 2) MY ANXIETY REGARDING TEACHING STALLS FOR THE FIRST TIME. IN THE FUTURE; I WILL AVOID SUCH POSSIBLE AIRSPACE VIOLATIONS BY MAINTAINING SITUATIONAL AWARENESS DURING ALL PHASES OF FLT AND REMAINING AT OR BELOW 7500 FT IN THIS AREA. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT THE TRAINEE WAS A PRIMARY PRE-SOLO STUDENT PLT AND THAT HE WAS LOCATED IN THE FLYING CLUBS DESIGNATED TRAINING AREA FOR PRIMARILY GND REF MANEUVERS SINCE THERE WAS A CLASS B FLOOR T THE HIGHER ALTS OVER THE AREA IN WHICH TRAINING COULD NOT BE SAFELY CONDUCTED. HE ADMITTED TO A LACK OF PREFLT PLANNING.