C172 instructor pilot reported an near midair collision with a NORDO aircraft while practicing maneu...

Attributes
ACN	1666558
Time
Date	201907
Local Time Of Day	1201-1800
Place
Locale Reference	APA.Airport
State Reference	CO
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Flight Plan	None
Aircraft 2
Make Model Name	SR22
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct
Person 1
Function	Instructor
Qualification	Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 141 Flight Crew Total 720 Flight Crew Type 192
Events
Anomaly	Conflict NMAC Deviation - Procedural Published Material / Policy
Miss Distance	Horizontal 100 Vertical 0

Narrative:

While training a student in the southeast practice area of centennial; having conducted clearing turns; the student entered a practice steep turn to the left. During the steep turn; I noticed an aircraft passing us on the left at the same altitude within close proximity. I immediately took over the aircraft and tightened the turn further and initiated a climb to the best of the aircraft's abilities. We missed the passing aircraft within 100 feet if not less. We were on the common traffic advisory for the practice area just southeast of centennial airport. We had announced we were in the 3 towers box maneuvering at 8;500 before initiating our maneuvers multiple times before and after. We attempted to see if the aircraft was on frequency but no response was received. We made a screenshot of our track log along with the aircraft from the ads-B. After the occurrence; we returned back to centennial with no further events.

Original NASA ASRS Text

Title: C172 instructor pilot reported an NMAC with a NORDO aircraft while practicing maneuvers.

Narrative: While training a student in the southeast practice area of Centennial; having conducted clearing turns; the student entered a practice steep turn to the left. During the steep turn; I noticed an aircraft passing us on the left at the same altitude within close proximity. I immediately took over the aircraft and tightened the turn further and initiated a climb to the best of the aircraft's abilities. We missed the passing aircraft within 100 feet if not less. We were on the common traffic advisory for the practice area just southeast of Centennial airport. We had announced we were in the 3 Towers box maneuvering at 8;500 before initiating our maneuvers multiple times before and after. We attempted to see if the aircraft was on frequency but no response was received. We made a screenshot of our track log along with the aircraft from the ADS-B. After the occurrence; we returned back to Centennial with no further events.

Data retrieved from NASA's ASRS site 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.

C172 instructor pilot reported an near midair collision with a NORDO aircraft while practicing maneuvers.