Small aircraft X had possible near midair collision with small aircraft Y. See and avoid concept.

Attributes
ACN	203607
Time
Date	199202
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bjc
State Reference	CO
Altitude	msl bound lower : 6500 msl bound upper : 6500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : bjc
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	other
Flight Plan	None
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
ASRS Report	203607
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 1500 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

1 aircraft called inbound about 7 mi north and was given landing instructions. The second aircraft called inbound 7 mi northeast and was given landing instructions. What transpired from those position until pattern entry is unknown. The small aircraft X reported he saw the small aircraft Y and stated 'we've got him in front of us.' the small aircraft Y turned downwind and was observed by the controller to be approximately 1/4 mi in front of the small aircraft X. Both aircraft were sequenced and subsequently both aircraft landed with proper separation. This report is being submitted because the pilot of small aircraft X is filing a near midair collision report.

Original NASA ASRS Text

Title: SMA X HAD POSSIBLE NMAC WITH SMA Y. SEE AND AVOID CONCEPT.

Narrative: 1 ACFT CALLED INBOUND ABOUT 7 MI N AND WAS GIVEN LNDG INSTRUCTIONS. THE SECOND ACFT CALLED INBOUND 7 MI NE AND WAS GIVEN LNDG INSTRUCTIONS. WHAT TRANSPIRED FROM THOSE POS UNTIL PATTERN ENTRY IS UNKNOWN. THE SMA X RPTED HE SAW THE SMA Y AND STATED 'WE'VE GOT HIM IN FRONT OF US.' THE SMA Y TURNED DOWNWIND AND WAS OBSERVED BY THE CTLR TO BE APPROX 1/4 MI IN FRONT OF THE SMA X. BOTH ACFT WERE SEQUENCED AND SUBSEQUENTLY BOTH ACFT LANDED WITH PROPER SEPARATION. THIS RPT IS BEING SUBMITTED BECAUSE THE PLT OF SMA X IS FILING A NEAR MIDAIR COLLISION RPT.

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.