Near midair collision between arriving small aircraft and second aircraft in traffic.

Attributes
ACN	128941
Time
Date	198911
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : gcn
State Reference	AZ
Altitude	msl bound lower : 7000 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : gcn
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Retractable Gear
Flight Phase	descent : approach other
Flight Plan	VFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	descent : approach other
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 70 flight time total : 4300 flight time type : 500
ASRS Report	128941
Person 2
Affiliation	Other
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	Other
Miss Distance	horizontal : 200 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Tower advised right downwind to land runway 3. Believed tower advised left downwind because of other traffic reporting left downwind. Problem caused by my not repeating instructions.

Original NASA ASRS Text

Title: NMAC BETWEEN ARRIVING SMA AND SECOND ACFT IN TRAFFIC.

Narrative: TWR ADVISED RIGHT DOWNWIND TO LAND RWY 3. BELIEVED TWR ADVISED LEFT DOWNWIND BECAUSE OF OTHER TFC REPORTING LEFT DOWNWIND. PROBLEM CAUSED BY MY NOT REPEATING INSTRUCTIONS.

Data retrieved from NASA's ASRS site as of August 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.