Two smas have near midair collision in the traffic pattern at apa.

Attributes
ACN	142877
Time
Date	199004
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : apa
State Reference	CO
Altitude	msl bound lower : 6500 msl bound upper : 6500
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tower : apa
Operator	general aviation : instructional
Make Model Name	Small Aircraft
Flight Phase	other
Flight Plan	None
Aircraft 2
Make Model Name	Small Aircraft
Flight Phase	other
Person 1
Affiliation	Other
Function	instruction : instructor
Qualification	pilot : commercial pilot : cfi pilot : instrument
Experience	flight time last 90 days : 80 flight time total : 1400 flight time type : 110
ASRS Report	142877
Person 2
Affiliation	Other
Function	instruction : trainee
Qualification	pilot : student
Events
Anomaly	conflict : nmac
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 50 vertical : 100
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Pilot Deviation

Narrative:

During touch and go traffic, in the pattern at apa runway 17R, we were turning right crosswind to downwind and noticed an small aircraft apparently entering on the same downwind from the south. Apa tower advised 'you are turning in front of aircraft' and at the same time we caught a glimpse of same aircraft (left wing high on our aircraft was restricting line of sight in that quadrant). We did not see the small aircraft previously nor did we receive traffic advisory prior to above mentioned transmission. A steep angle of bank to the right on our part with a turn toward the west by the other aircraft, provided avoidance for both.

Original NASA ASRS Text

Title: TWO SMAS HAVE NMAC IN THE TRAFFIC PATTERN AT APA.

Narrative: DURING TOUCH AND GO TFC, IN THE PATTERN AT APA RWY 17R, WE WERE TURNING R XWIND TO DOWNWIND AND NOTICED AN SMA APPARENTLY ENTERING ON THE SAME DOWNWIND FROM THE S. APA TWR ADVISED 'YOU ARE TURNING IN FRONT OF ACFT' AND AT THE SAME TIME WE CAUGHT A GLIMPSE OF SAME ACFT (L WING HIGH ON OUR ACFT WAS RESTRICTING LINE OF SIGHT IN THAT QUADRANT). WE DID NOT SEE THE SMA PREVIOUSLY NOR DID WE RECEIVE TFC ADVISORY PRIOR TO ABOVE MENTIONED XMISSION. A STEEP ANGLE OF BANK TO THE R ON OUR PART WITH A TURN TOWARD THE W BY THE OTHER ACFT, PROVIDED AVOIDANCE FOR BOTH.

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.