Mooney 201 entering downwind has an near midair collision with an aztec already on downwind leg.

Attributes
ACN	348113
Time
Date	199609
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : fdk
State Reference	MD
Altitude	agl bound lower : 1000 agl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	M-20 J (201)
Operating Under FAR Part	Part 91
Flight Phase	other
Flight Plan	VFR
Aircraft 2
Make Model Name	PA-23-250 Aztec
Operating Under FAR Part	Part 91
Flight Phase	other
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : cfi pilot : atp
Experience	flight time last 90 days : 50 flight time total : 2600 flight time type : 400
ASRS Report	348113
Person 2
Affiliation	Other
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Miss Distance	horizontal : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Situations
Airport	procedure or policy : unspecified

Narrative:

In sum: active runway was runway 30. Reporter approached from east, flew wbound south of airport, flew north and finally turned to the east to enter the left downwind. Meanwhile, the aztec had already joined the downwind but reporter is unsure where or how he did it. The reporter turned right onto downwind, as he rolled out of the turn, the aztec was ahead and to the right about 200 ft away. Reporter complained the aztec was on a wide downwind. Reporter wants a control tower at this airport. Reporter said unicom calls made by aztec were not sufficient.

Original NASA ASRS Text

Title: MOONEY 201 ENTERING DOWNWIND HAS AN NMAC WITH AN AZTEC ALREADY ON DOWNWIND LEG.

Narrative: IN SUM: ACTIVE RWY WAS RWY 30. RPTR APCHED FROM E, FLEW WBOUND S OF ARPT, FLEW N AND FINALLY TURNED TO THE E TO ENTER THE L DOWNWIND. MEANWHILE, THE AZTEC HAD ALREADY JOINED THE DOWNWIND BUT RPTR IS UNSURE WHERE OR HOW HE DID IT. THE RPTR TURNED R ONTO DOWNWIND, AS HE ROLLED OUT OF THE TURN, THE AZTEC WAS AHEAD AND TO THE R ABOUT 200 FT AWAY. RPTR COMPLAINED THE AZTEC WAS ON A WIDE DOWNWIND. RPTR WANTS A CTL TWR AT THIS ARPT. RPTR SAID UNICOM CALLS MADE BY AZTEC WERE NOT SUFFICIENT.

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.