C172 instructor and student and a PA24 had an near midair collision in prc class D airspace.

Attributes
ACN	547074
Time
Date	200206
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : prc.airport
State Reference	AZ
Altitude	msl single value : 5800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : prc.tower
Operator	general aviation : personal
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
Controlling Facilities	tower : prc.tower
Operator	general aviation : personal
Make Model Name	PA-36 Pawnee Brave
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : commercial pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 1640 flight time type : 1200
ASRS Report	547074
Person 2
Affiliation	other
Function	instruction : trainee
Events
Anomaly	conflict : nmac non adherence : far non adherence : published procedure non adherence : required legal separation other anomaly other
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance controller : provided flight assist flight crew : took evasive action none taken : detected after the fact
Miss Distance	horizontal : 50 vertical : 200
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance Airspace Structure
Primary Problem	Ambiguous
Air Traffic Incident	other

Narrative:

While in the traffic pattern at prc my student and I were practicing touch-and-goes in the left downwind for runway 21L. We had gotten abeam the departure end of the runway when I noticed a piper comanche turned early crosswind and caused near midair collision. Luckily my student didn't hold traffic pattern altitude so the comanche turned downwind right over us. I asked tower what he was doing and they said they didn't know. So I requested a 360 degree turn for spacing. Both the comanche and I landed without incident.

Original NASA ASRS Text

Title: C172 INSTRUCTOR AND STUDENT AND A PA24 HAD AN NMAC IN PRC CLASS D AIRSPACE.

Narrative: WHILE IN THE TFC PATTERN AT PRC MY STUDENT AND I WERE PRACTICING TOUCH-AND-GOES IN THE L DOWNWIND FOR RWY 21L. WE HAD GOTTEN ABEAM THE DEP END OF THE RWY WHEN I NOTICED A PIPER COMANCHE TURNED EARLY XWIND AND CAUSED NMAC. LUCKILY MY STUDENT DIDN'T HOLD TFC PATTERN ALT SO THE COMANCHE TURNED DOWNWIND RIGHT OVER US. I ASKED TWR WHAT HE WAS DOING AND THEY SAID THEY DIDN'T KNOW. SO I REQUESTED A 360 DEG TURN FOR SPACING. BOTH THE COMANCHE AND I LANDED WITHOUT INCIDENT.

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.