PA28 instructor pilot entering the cgz traffic pattern on the 45 reports a near midair collision wit...

Narrative:

While entering left downwind on a 45 entry for runway 05 at cgz we almost collided with a high wing cessna. We had been making radio calls 10 miles out; 5 miles out; 3 mile 45; and entering downwind. While merging in the downwind I (the instructor pilot sitting right seat) looked left one last time and noticed the cessna climbing above us. I reduced power and kept the cessna insight; discontinued the traffic pattern. I had attempted multiple radio calls to 'cessna in the downwind' with no response. Eventually I heard 'skylane xyz; radio check.' I confirmed that skylane xyz was the aircraft involved in the near midair collision and he admitted that he was having radio problems; not able to communicate very well. The G430 had no traffic information on it as we were not in radar contact. Look outside more and do not fly cgz on heavy traffic days.

Original NASA ASRS Text

Title: PA28 instructor pilot entering the CGZ traffic pattern on the 45 reports a NMAC with a C182 climbing on the downwind. CTAF procedures were in use by the instructor but no reports were received from the C182; whose pilot latter admitted to having radio difficulties.

Narrative: While entering left downwind on a 45 entry for Runway 05 at CGZ we almost collided with a high wing Cessna. We had been making radio calls 10 miles out; 5 miles out; 3 mile 45; and entering downwind. While merging in the downwind I (the instructor pilot sitting right seat) looked left one last time and noticed the Cessna climbing above us. I reduced power and kept the Cessna insight; discontinued the traffic pattern. I had attempted multiple radio calls to 'Cessna in the downwind' with no response. Eventually I heard 'Skylane XYZ; radio check.' I confirmed that Skylane XYZ was the aircraft involved in the NMAC and he admitted that he was having radio problems; not able to communicate very well. The G430 had no traffic information on it as we were not in radar contact. Look outside more and do not fly CGZ on heavy traffic days.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1115607
Time
Date	201309
Local Time Of Day	0601-1200
Place
Locale Reference	CGZ.Airport
State Reference	AZ
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	PA-28 Cherokee/Archer/Dakota/Pillan/Warrior
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Aircraft 2
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Person 1
Function	Instructor Pilot Not Flying
Events
Anomaly	Conflict NMAC

PA28 instructor pilot entering the cgz traffic pattern on the 45 reports a near midair collision with a C182 climbing on the downwind. CTAF procedures were in use by the instructor but no reports were received from the C182; whose pilot latter admitted to having radio difficulties.