Instructor pilot of C172 reports that poor CTAF radio procedures by another aircraft in the uncontro...

Attributes
ACN	591275
Time
Date	200308
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : 2v2.airport
State Reference	CO
Altitude	msl single value : 5600
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 : visual approach : traffic pattern
Flight Plan	None
Aircraft 2
Make Model Name	Mooney Aircraft Undifferentiated or Other Model
Flight Phase	descent : approach
Route In Use	approach : visual
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : cfi pilot : multi engine pilot : instrument pilot : commercial
Experience	flight time last 90 days : 200 flight time total : 485 flight time type : 300
ASRS Report	591275
Person 2
Affiliation	other
Function	instruction : trainee
Events
Anomaly	other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Miss Distance	horizontal : 300 vertical : 0
Supplementary
Problem Areas	Airspace Structure Airport Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

I was in a C172 with a student at (2v2), doing touch and goes at the airport. I reported turning a left downwind from a left crosswind for runway 29, and heard a mooney report to the south planning to enter the left downwind at midfield. I had the mooney in sight to my right, and it was clear to me that I would be in front of him in the pattern. Once passing midfield on a left downwind, we reported our location, the mooney reported that he would enter behind us. I knew that there was a plane directly behind him, which made it three in the pattern on downwind. Since I knew the mooney was most likely traveling faster than us, I decided to make a short approach, so I pulled my student's throttle back to idle, he turned an early left base for runway 29. I reported turning an early left base and making a short approach for runway 29. I heard no call from the mooney that he had turned left base. Once we were established on left base, I looked to my right, and the mooney was at the same altitude, but just outside of my base leg. He was also on a left base. I alerted him to my presence, and that we were inside of him, and he said that he would go around. After our touch and go, the mooney reported us in sight and offered to follow us in the pattern. I said that my student and I would extend upwind and follow him around. Both of us continued in the pattern (we followed) without incident. The radio calls made by mooney throughout this event were incomplete and fairly infrequent. To prevent: a published pattern altitude (he was reported flying at 600 ft AGL). Also better radio training for all pilots.

Original NASA ASRS Text

Title: INSTRUCTOR PLT OF C172 RPTS THAT POOR CTAF RADIO PROCS BY ANOTHER ACFT IN THE UNCTLED TFC PATTERN AT 2V2 RESULTED IN LESS THAN DESIRABLE SEPARATION ON BASE LEG.

Narrative: I WAS IN A C172 WITH A STUDENT AT (2V2), DOING TOUCH AND GOES AT THE ARPT. I RPTED TURNING A L DOWNWIND FROM A L XWIND FOR RWY 29, AND HEARD A MOONEY RPT TO THE S PLANNING TO ENTER THE L DOWNWIND AT MIDFIELD. I HAD THE MOONEY IN SIGHT TO MY R, AND IT WAS CLR TO ME THAT I WOULD BE IN FRONT OF HIM IN THE PATTERN. ONCE PASSING MIDFIELD ON A L DOWNWIND, WE RPTED OUR LOCATION, THE MOONEY RPTED THAT HE WOULD ENTER BEHIND US. I KNEW THAT THERE WAS A PLANE DIRECTLY BEHIND HIM, WHICH MADE IT THREE IN THE PATTERN ON DOWNWIND. SINCE I KNEW THE MOONEY WAS MOST LIKELY TRAVELING FASTER THAN US, I DECIDED TO MAKE A SHORT APCH, SO I PULLED MY STUDENT'S THROTTLE BACK TO IDLE, HE TURNED AN EARLY L BASE FOR RWY 29. I RPTED TURNING AN EARLY L BASE AND MAKING A SHORT APCH FOR RWY 29. I HEARD NO CALL FROM THE MOONEY THAT HE HAD TURNED L BASE. ONCE WE WERE ESTABLISHED ON L BASE, I LOOKED TO MY R, AND THE MOONEY WAS AT THE SAME ALT, BUT JUST OUTSIDE OF MY BASE LEG. HE WAS ALSO ON A L BASE. I ALERTED HIM TO MY PRESENCE, AND THAT WE WERE INSIDE OF HIM, AND HE SAID THAT HE WOULD GO AROUND. AFTER OUR TOUCH AND GO, THE MOONEY RPTED US IN SIGHT AND OFFERED TO FOLLOW US IN THE PATTERN. I SAID THAT MY STUDENT AND I WOULD EXTEND UPWIND AND FOLLOW HIM AROUND. BOTH OF US CONTINUED IN THE PATTERN (WE FOLLOWED) WITHOUT INCIDENT. THE RADIO CALLS MADE BY MOONEY THROUGHOUT THIS EVENT WERE INCOMPLETE AND FAIRLY INFREQUENT. TO PREVENT: A PUBLISHED PATTERN ALT (HE WAS RPTED FLYING AT 600 FT AGL). ALSO BETTER RADIO TRAINING FOR ALL PLTS.

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.

Instructor pilot of C172 reports that poor CTAF radio procedures by another aircraft in the uncontrolled traffic pattern at 2v2 resulted in less than desirable separation on base leg.