Sct controller loses separation between departing lax air carrier and smo GA aircraft.

Attributes
ACN	507058
Time
Date	200104
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : sct.tracon
State Reference	CA
Altitude	msl single value : 2000
Environment
Flight Conditions	Marginal
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	climbout : initial ground : parked
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : sct.tracon
Operator	general aviation : personal
Make Model Name	Cessna 310/T310C
Operating Under FAR Part	Part 91
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 16 controller time certified in position1 : 3
ASRS Report	507058
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne critical conflict : nmac non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	flight crew : took evasive action none taken : insufficient time
Miss Distance	horizontal : 2000 vertical : 300
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Aircraft #2 departed smo airport runway 21, flew runway heading (in non compliance with instructions), did not turn on transponder, and did not contact departure until several mi offshore. Aircraft #1 departed lax runway 24L and flew runway heading. When aircraft #2 called, I did not see a primary or secondary target southwest of smo, so I told aircraft #2 to squawk the beacon code on the strip. I then observed a secondary target appear in front of aircraft #1. Since aircraft #1 had not called, I broadcast 'in the blind' and instructed aircraft #1 to turn right. I observed aircraft #1 pass 1/4 - 1/2 mi behind aircraft #2 at 2000 ft. Aircraft #2 was observed at this point at 2300 ft. Subsequent contact with aircraft #1 revealed that he had aircraft #2 in sight -- at least long enough to realize that he should stay VMC.

Original NASA ASRS Text

Title: SCT CTLR LOSES SEPARATION BTWN DEPARTING LAX ACR AND SMO GA ACFT.

Narrative: ACFT #2 DEPARTED SMO ARPT RWY 21, FLEW RWY HDG (IN NON COMPLIANCE WITH INSTRUCTIONS), DID NOT TURN ON XPONDER, AND DID NOT CONTACT DEP UNTIL SEVERAL MI OFFSHORE. ACFT #1 DEPARTED LAX RWY 24L AND FLEW RWY HDG. WHEN ACFT #2 CALLED, I DID NOT SEE A PRIMARY OR SECONDARY TARGET SW OF SMO, SO I TOLD ACFT #2 TO SQUAWK THE BEACON CODE ON THE STRIP. I THEN OBSERVED A SECONDARY TARGET APPEAR IN FRONT OF ACFT #1. SINCE ACFT #1 HAD NOT CALLED, I BROADCAST 'IN THE BLIND' AND INSTRUCTED ACFT #1 TO TURN R. I OBSERVED ACFT #1 PASS 1/4 - 1/2 MI BEHIND ACFT #2 AT 2000 FT. ACFT #2 WAS OBSERVED AT THIS POINT AT 2300 FT. SUBSEQUENT CONTACT WITH ACFT #1 REVEALED THAT HE HAD ACFT #2 IN SIGHT -- AT LEAST LONG ENOUGH TO REALIZE THAT HE SHOULD STAY VMC.

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.