Sct controller experienced a loss of separation event when accepting non standard traffic from an ad...

Narrative:

I was working the arrival/departure sector for crq/okb/nfg/rnm airports. Traffic was busy with numerous arrivals/departures and overflights. A BE35 was on route from jli to ocn on V458 airway. I received the hand off from the sdmr; miramar sector on the BE35 at 8;000 ft westbound along the airway as per the SOP for southern california TRACON. Shortly after; miramar radar called back and said 'sorry; I descended the BE35 down to 6;000 ft. I had aircraft at 4;000 ft; 5;000 ft; 6;000 ft; and 7;000 ft ahead of the BE35's route. I said okay and planned on moving the aircraft out of the way. I turned a C525; at 6;000 ft; north-easterly to diverge away from the BE35; but made the turn too late. I estimate I had 2 miles lateral at same altitude before divergence had occurred. I wanted to climb the C525 to 7;000 ft; but also had southbound traffic north of him at 7;000 ft. The error would not have occurred had I not accepted a non-standard procedure and tried to make it work during a busy session. The BE35 could have stayed at 8;000 ft; been in conflict with no-one; and still complied with procedures.

Original NASA ASRS Text

Title: SCT Controller experienced a loss of separation event when accepting non standard traffic from an adjacent sector that was in conflict with other sector traffic; the reporter listed non standard procedures as a causal factor.

Narrative: I was working the arrival/departure sector for CRQ/OKB/NFG/RNM airports. Traffic was busy with numerous arrivals/departures and overflights. A BE35 was on route from JLI to OCN on V458 airway. I received the hand off from the SDMR; Miramar Sector on the BE35 at 8;000 FT westbound along the airway as per the SOP for Southern California TRACON. Shortly after; Miramar RADAR called back and said 'sorry; I descended the BE35 down to 6;000 FT. I had aircraft at 4;000 FT; 5;000 FT; 6;000 FT; and 7;000 FT ahead of the BE35's route. I said okay and planned on moving the aircraft out of the way. I turned a C525; at 6;000 FT; north-easterly to diverge away from the BE35; but made the turn too late. I estimate I had 2 miles lateral at same altitude before divergence had occurred. I wanted to climb the C525 to 7;000 FT; but also had southbound traffic north of him at 7;000 FT. The error would not have occurred had I not accepted a non-standard procedure and tried to make it work during a busy session. The BE35 could have stayed at 8;000 FT; been in conflict with no-one; and still complied with procedures.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	986155
Time
Date	201112
Local Time Of Day	1801-2400
Place
Locale Reference	SCT.TRACON
State Reference	CA
Aircraft 1
Make Model Name	Citationjet (C525/C526) - CJ I / II / III / IV
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Bonanza 35
Operating Under FAR Part	Part 91
Flight Phase	Descent
Flight Plan	IFR
Person 1
Function	Approach Departure
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Airspace Violation All Types Deviation - Procedural Published Material / Policy

Sct controller experienced a loss of separation event when accepting non standard traffic from an adjacent sector that was in conflict with other sector traffic; the reporter listed non standard procedures as a causal factor.