Narrative:

Los angeles departed a heavy less than three miles behind a crj; on the same route. Vertical separation was not lost; but was not ensured. Also; considering the performance characteristics of these aircraft; the sct SOP states that the heavy will be issued a speed not to exceed 280 KTS from manhatten radar to newport radar; whereas the crj preceding the heavy would have to be issued a speed of 250 KTS. So; not only did I have less than three miles from the tower; I then must protect for up to a thirty knot overtake when I hand these two aircraft to newport. Obviously; we should have more than three miles from the tower; but at a minimum we should expect no less than standard separation. Recommendation; los angeles tower should provide standard IFR separation.

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Original NASA ASRS Text

Title: SCT controller voiced concern regarding LAX Tower's failure to provide adequate in trail separation between successive departures on the same route.

Narrative: Los Angeles departed a heavy less than three miles behind a CRJ; on the same route. Vertical separation was not lost; but was not ensured. Also; considering the performance characteristics of these aircraft; the SCT SOP states that the Heavy will be issued a speed not to exceed 280 KTS from Manhatten Radar to Newport Radar; whereas the CRJ preceding the Heavy would have to be issued a speed of 250 KTS. So; not only did I have less than three miles from the Tower; I then must protect for up to a thirty knot overtake when I hand these two aircraft to Newport. Obviously; we should have more than three miles from the Tower; but at a minimum we should expect no less than standard separation. Recommendation; Los Angeles Tower should provide standard IFR separation.

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.