Near midair collision.

Attributes
ACN	260958
Time
Date	199401
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : apa
State Reference	CO
Altitude	msl bound lower : 6800 msl bound upper : 6800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : apa tower : pvd
Operator	general aviation : personal
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	descent : approach landing other other
Route In Use	approach : visual
Flight Plan	VFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	PA-44 Seminole Turbo Seminole
Operating Under FAR Part	Part 91
Flight Phase	descent : approach landing : go around other
Route In Use	approach : visual
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 10 flight time total : 100 flight time type : 100
ASRS Report	260958
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : nmac non adherence : far non adherence : clearance other spatial deviation
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 75 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I misunderstood ATC instructions by entering right instead of left downwind to runway 17L. Confusion ATC/pilot arose. I found myself on final for runway 17L with a light twin. We took evasive action. I landed. He went around. I turned left instead of right. Tower cleared me for landing on runway 17L. Tower asked 'rock your wings, you are not in sight.' on base, tower asked me to rock my wings. I said, 'I'm turning final with seminol in sight.'

Original NASA ASRS Text

Title: NMAC.

Narrative: I MISUNDERSTOOD ATC INSTRUCTIONS BY ENTERING R INSTEAD OF L DOWNWIND TO RWY 17L. CONFUSION ATC/PLT AROSE. I FOUND MYSELF ON FINAL FOR RWY 17L WITH A LIGHT TWIN. WE TOOK EVASIVE ACTION. I LANDED. HE WENT AROUND. I TURNED L INSTEAD OF R. TWR CLRED ME FOR LNDG ON RWY 17L. TWR ASKED 'ROCK YOUR WINGS, YOU ARE NOT IN SIGHT.' ON BASE, TWR ASKED ME TO ROCK MY WINGS. I SAID, 'I'M TURNING FINAL WITH SEMINOL IN SIGHT.'

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.