Small aircraft in traffic pattern has namc with a second small aircraft on an instrument departure.

Attributes
ACN	99254
Time
Date	198812
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : crq
State Reference	CA
Altitude	msl bound lower : 1200 msl bound upper : 1200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : san tower : crq
Operator	general aviation : instructional
Make Model Name	Small Aircraft
Flight Phase	other
Flight Plan	None
Aircraft 2
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	instruction : instructor
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 240 flight time total : 1640 flight time type : 400
ASRS Report	99254
Person 2
Affiliation	Other
Function	instruction : trainee
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 400 vertical : 50
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

We were climbing out from runway 24 at crq. Tower advised us to extend our upwind to the freeway until turning crosswind. As the student finished turning downwind and initiated a level off, I noticed a tan, straight-tailed small aircraft at our 1 O'clock moving to 12 O'clock position. He appeared to be approximately 300-500' horizontal and 50-100' vertical from us. I took over the controls and started a slight right turn in case the pilot of the small aircraft did not have us in sight and informed the tower that an small aircraft had pass in front of us. The tower tried to contact the small aircraft and received no reply. They told me the small aircraft was an IFR departure and must have been turning early by san departure.

Original NASA ASRS Text

Title: SMA IN TRAFFIC PATTERN HAS NAMC WITH A SECOND SMA ON AN INSTRUMENT DEP.

Narrative: WE WERE CLBING OUT FROM RWY 24 AT CRQ. TWR ADVISED US TO EXTEND OUR UPWIND TO THE FREEWAY UNTIL TURNING XWIND. AS THE STUDENT FINISHED TURNING DOWNWIND AND INITIATED A LEVEL OFF, I NOTICED A TAN, STRAIGHT-TAILED SMA AT OUR 1 O'CLOCK MOVING TO 12 O'CLOCK POS. HE APPEARED TO BE APPROX 300-500' HORIZ AND 50-100' VERT FROM US. I TOOK OVER THE CTLS AND STARTED A SLIGHT RIGHT TURN IN CASE THE PLT OF THE SMA DID NOT HAVE US IN SIGHT AND INFORMED THE TWR THAT AN SMA HAD PASS IN FRONT OF US. THE TWR TRIED TO CONTACT THE SMA AND RECEIVED NO REPLY. THEY TOLD ME THE SMA WAS AN IFR DEP AND MUST HAVE BEEN TURNING EARLY BY SAN DEP.

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.