A C182RG check pilot reported an near midair collision at prc with another training aircraft.

Attributes
ACN	618153
Time
Date	200405
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : prc.airport
State Reference	AZ
Altitude	msl single value : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : prc.tower
Operator	general aviation : instructional
Make Model Name	Cessna Stationair/Turbo Stationair 6
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Flight Plan	VFR
Aircraft 2
Controlling Facilities	tower : prc.tower
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
Person 1
Affiliation	other
Function	instruction : instructor observation : company check pilot oversight : pic
Qualification	pilot : cfi
Experience	flight time last 90 days : 75 flight time total : 1800 flight time type : 45
ASRS Report	618153
Person 2
Affiliation	other
Function	instruction : trainee
Events
Anomaly	conflict : nmac non adherence : clearance non adherence : far non adherence other other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 0 vertical : 30
Supplementary
Problem Areas	ATC Human Performance Environmental Factor Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was conducting a CFI check ride and was sitting in the left seat. We were in right closed traffic for runway 21R. Tower instructed the aircraft in front of us to extend upwind to a known landmark. The same instruction was given to us as well. Once established on downwind, tower pointed the traffic we were to follow and, we found and idented it. I looked out the left side window to insure no one was inbound on the right 45 degree entry. As I turned my head to the right to look about the opposite side, a C172 emerged from below and filled the entire window. The aircraft was in a climbing right bank. I immediately took the flight controls, banked approximately 50 degrees, and decreased the pitch attitude descending from 6000 ft to 5500 ft. I would estimate that we missed contacting each other by less than 30 ft. It is my understanding that the second aircraft was instructed to follow us.

Original NASA ASRS Text

Title: A C182RG CHK PLT RPTED AN NMAC AT PRC WITH ANOTHER TRAINING ACFT.

Narrative: I WAS CONDUCTING A CFI CHK RIDE AND WAS SITTING IN THE L SEAT. WE WERE IN R CLOSED TFC FOR RWY 21R. TWR INSTRUCTED THE ACFT IN FRONT OF US TO EXTEND UPWIND TO A KNOWN LANDMARK. THE SAME INSTRUCTION WAS GIVEN TO US AS WELL. ONCE ESTABLISHED ON DOWNWIND, TWR POINTED THE TFC WE WERE TO FOLLOW AND, WE FOUND AND IDENTED IT. I LOOKED OUT THE L SIDE WINDOW TO INSURE NO ONE WAS INBOUND ON THE R 45 DEG ENTRY. AS I TURNED MY HEAD TO THE R TO LOOK ABOUT THE OPPOSITE SIDE, A C172 EMERGED FROM BELOW AND FILLED THE ENTIRE WINDOW. THE ACFT WAS IN A CLBING R BANK. I IMMEDIATELY TOOK THE FLT CTLS, BANKED APPROX 50 DEGS, AND DECREASED THE PITCH ATTITUDE DSNDING FROM 6000 FT TO 5500 FT. I WOULD ESTIMATE THAT WE MISSED CONTACTING EACH OTHER BY LESS THAN 30 FT. IT IS MY UNDERSTANDING THAT THE SECOND ACFT WAS INSTRUCTED TO FOLLOW US.

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.