C172 pilot has a close encounter with another aircraft at gtu; an uncontrolled airport.

Attributes
ACN	696971
Time
Date	200605
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : gtu.airport
State Reference	TX
Altitude	agl single value : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Flight Plan	None
Aircraft 2
Operator	general aviation : personal
Make Model Name	Bonanza 35
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : visual
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : multi engine pilot : cfi pilot : commercial pilot : instrument
Experience	flight time last 90 days : 300 flight time total : 1460 flight time type : 225
ASRS Report	696971
Person 2
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne critical non adherence : required legal separation non adherence : far other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : took precautionary avoidance action
Miss Distance	horizontal : 500 vertical : 0
Supplementary
Problem Areas	Airspace Structure Airport Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

I was giving complex airplane traffic pattern training to my student; who was flying the aircraft. The traffic patter had been quiet but two aircraft called at about the same time stating that they were inbound on the GPS runway 36 approach at georgetown. My student and I were practicing lndgs on runway 36. We completed another landing on the runway and monitored the CTAF for the inbound traffic on the GPS approach. There were two aircraft (a beech duchess and an rv-4) conducting their run-ups at the runway. The first aircraft on the GPS approach was a diamond STAR and announced that he was now on a 2 mi final. From the CTAF it seemed that there was a cessna 400 series on the approach behind the diamond. We were now upwind and I pretty much assumed that the diamond would not be a factor. At this time a king air announced that he was entering the downwind for runway 36. Turning crosswind I spotted the king air and now wanted to get a visual on the diamond and the twin cessna. On downwind I saw the diamond touch down on the runway and noticed that the twin cessna was on very short final. I got the attention of my student to see how the twin cessna douched down about 1000 ft behind the diamond (still rolling out) with locked brakes that generated a lot of smoke. The king air was now on base and I announced on the CTAF that we would extend our downwind so that the aircraft waiting to take off could do so. The king air pilot told me that there was somebody on long final on the GPS approach. I thought that he was talking about the incident that had just happened. We eventually turned a 3 mile base when I spotted the bonanza directly in front of us at our altitude; on very long final. I announced that we would continue our downwind now for this traffic and we finally extended it out to about 4 miles. It has become somewhat common at this airport for pilots to try to avoid the pattern by using the GPS approaches; but this is the first time that I have see three aircraft within a space of 5 miles trying to use this trick.

Original NASA ASRS Text

Title: C172 PLT HAS A CLOSE ENCOUNTER WITH ANOTHER ACFT AT GTU; AN UNCONTROLLED ARPT.

Narrative: I WAS GIVING COMPLEX AIRPLANE TRAFFIC PATTERN TRAINING TO MY STUDENT; WHO WAS FLYING THE ACFT. THE TFC PATTER HAD BEEN QUIET BUT TWO ACFT CALLED AT ABOUT THE SAME TIME STATING THAT THEY WERE INBOUND ON THE GPS RWY 36 APCH AT GEORGETOWN. MY STUDENT AND I WERE PRACTICING LNDGS ON RWY 36. WE COMPLETED ANOTHER LNDG ON THE RWY AND MONITORED THE CTAF FOR THE INBOUND TFC ON THE GPS APCH. THERE WERE TWO ACFT (A BEECH DUCHESS AND AN RV-4) CONDUCTING THEIR RUN-UPS AT THE RWY. THE FIRST ACFT ON THE GPS APCH WAS A DIAMOND STAR AND ANNOUNCED THAT HE WAS NOW ON A 2 MI FINAL. FROM THE CTAF IT SEEMED THAT THERE WAS A CESSNA 400 SERIES ON THE APCH BEHIND THE DIAMOND. WE WERE NOW UPWIND AND I PRETTY MUCH ASSUMED THAT THE DIAMOND WOULD NOT BE A FACTOR. AT THIS TIME A KING AIR ANNOUNCED THAT HE WAS ENTERING THE DOWNWIND FOR RWY 36. TURNING CROSSWIND I SPOTTED THE KING AIR AND NOW WANTED TO GET A VISUAL ON THE DIAMOND AND THE TWIN CESSNA. ON DOWNWIND I SAW THE DIAMOND TOUCH DOWN ON THE RWY AND NOTICED THAT THE TWIN CESSNA WAS ON VERY SHORT FINAL. I GOT THE ATTENTION OF MY STUDENT TO SEE HOW THE TWIN CESSNA DOUCHED DOWN ABOUT 1000 FT BEHIND THE DIAMOND (STILL ROLLING OUT) WITH LOCKED BRAKES THAT GENERATED A LOT OF SMOKE. THE KING AIR WAS NOW ON BASE AND I ANNOUNCED ON THE CTAF THAT WE WOULD EXTEND OUR DOWNWIND SO THAT THE ACFT WAITING TO TAKE OFF COULD DO SO. THE KING AIR PLT TOLD ME THAT THERE WAS SOMEBODY ON LONG FINAL ON THE GPS APCH. I THOUGHT THAT HE WAS TALKING ABOUT THE INCIDENT THAT HAD JUST HAPPENED. WE EVENTUALLY TURNED A 3 MILE BASE WHEN I SPOTTED THE BONANZA DIRECTLY IN FRONT OF US AT OUR ALT; ON VERY LONG FINAL. I ANNOUNCED THAT WE WOULD CONTINUE OUR DOWNWIND NOW FOR THIS TFC AND WE FINALLY EXTENDED IT OUT TO ABOUT 4 MILES. IT HAS BECOME SOMEWHAT COMMON AT THIS ARPT FOR PLTS TO TRY TO AVOID THE PATTERN BY USING THE GPS APPROACHES; BUT THIS IS THE FIRST TIME THAT I HAVE SEE THREE ACFT WITHIN A SPACE OF 5 MILES TRYING TO USE THIS TRICK.

Data retrieved from NASA's ASRS site as of January 2009 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.