Skyhawk 172/Cutlass 172
Flight Crew Instrument; Flight Crew Commercial; Flight Crew Flight Instructor
Flight Crew Last 90 Days 30; Flight Crew Total 304; Flight Crew Type 105
Situational Awareness
No Specific Anomaly Occurred All Types
General None Reported / Taken
Chart Or Publication; Airspace Structure; Human Factors
As a very new CFI-I; I was working with one of my first students. Already instrument rated; he needed to build simulated instrument time to meet the 141 requirements for his commercial course. We flew two practice approaches at Greeley-Weld County (GXY) airport and decided to finish by flying the recently revised ILS/DME Rwy 35. We flew the approach as published using the hold-in-lieu of a procedure turn at WELDS. Later that day; another instructor pointed out how close the new published course reversal is to the 7;000 FT msl shelf around Denver's class B airspace. I hadn't realized this and began to analyze the approach we had just flown earlier that day. Because of the slow speed of our Skyhawk; I believe the 1-minute legs of our course reversal kept us from an incursion into the class B; but only just.The new approach procedure had been effective for only a few weeks; and while I did take time to familiarize myself with it; I neglected to notice how much further south the new procedure would take us. I have learned a valuable lesson as a new CFI. It is important maintain my situational awareness even if it means sacrificing a teaching moment. I was so focused on teaching the approach that I lost sight of the bigger picture.
A newly certified CFII providing time accumulation training to another pilot flew two practice Runway 35 ILS approaches to GXY; including course reversal holding patterns at the published 7;000 MSL altitude at and beyond the IAF; I-DCI; WELDS; 14.5 NM south. He was later reminded by another instructor of his proximity to the 7;000 FT intermediate ring floor of the DEN Class B in that vicinity while conducting those reversals.