Narrative:

We were to depart runway 25R at lax at intersection F. The WX was reporting few clouds between 1000-2000 ft. A larger aircraft departed ahead of us and then we were cleared for takeoff. I was flying the airplane and shortly after takeoff because of the few clouds I lost sight of the aircraft departing in front of us. We were flying a seal beach 3 departure. As I was concerned about the potential wake turbulence problem, we were reconfiguring the aircraft to climb, switching from tower to approach, and trying to see the aircraft ahead of us. By the time we reestablished contact with the aircraft ahead of us we were past the smo 154 degree radial by approximately, at most, 1 mi. We were then given a left turn to a heading of 110 degrees. In the meantime air carrier Y aircraft was departing runways 24 and because we started our turn late, socal claims they had a conflict show up on their radar. When we arrived in psp I was asked to call supervisor a at socal. The air carrier Y aircraft was flying a loop 9 departure. Supplemental information from acn 341120: aircraft X departed runway 25R at lax. Aircraft Y departed runway 24L at lax. Aircraft X was issued seal beach 3 SID, which requires a left turn to heading 200 degrees after crossing smo 154 degree radial. Aircraft X did not turn. Aircraft Y was immediately north of aircraft X at the same altitude. Both aircraft were heading 250 degrees climbing to 3000 ft. Supplemental information from acn 341113: the timing for this departure happens in a quick sequence. The low clouds were a large function of the conflict. The smo 154 degree radial on the SID is a very narrow radial because of the close proximity of the smo VOR to the lax airport. The concern for the wake turbulence and losing sight of and trying to regain contact on him is what caused us to fly through the smo 154 degree radial. With the cleaning up of our aircraft and switching communications there was a lot going on in a very short distance. Another problem is that lax and other large airports squeeze very closely aircraft arriving and departing.

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Original NASA ASRS Text

Title: ACR LTT DELAYS TURN ON SID, LOSES EXPECTED SEPARATION WITH DEP ACR ACFT ON SIMULTANEOUS DEP, DIFFERENT SID. DEP CTLR GIVES REVISED CLRNC, HDG AFTER REDUCED SEPARATION NOTED. CREATES NEED FOR CALL TO TRACON SUPVR.

Narrative: WE WERE TO DEPART RWY 25R AT LAX AT INTXN F. THE WX WAS RPTING FEW CLOUDS BTWN 1000-2000 FT. A LARGER ACFT DEPARTED AHEAD OF US AND THEN WE WERE CLRED FOR TKOF. I WAS FLYING THE AIRPLANE AND SHORTLY AFTER TKOF BECAUSE OF THE FEW CLOUDS I LOST SIGHT OF THE ACFT DEPARTING IN FRONT OF US. WE WERE FLYING A SEAL BEACH 3 DEP. AS I WAS CONCERNED ABOUT THE POTENTIAL WAKE TURB PROB, WE WERE RECONFIGURING THE ACFT TO CLB, SWITCHING FROM TWR TO APCH, AND TRYING TO SEE THE ACFT AHEAD OF US. BY THE TIME WE REESTABLISHED CONTACT WITH THE ACFT AHEAD OF US WE WERE PAST THE SMO 154 DEG RADIAL BY APPROX, AT MOST, 1 MI. WE WERE THEN GIVEN A L TURN TO A HDG OF 110 DEGS. IN THE MEANTIME ACR Y ACFT WAS DEPARTING RWYS 24 AND BECAUSE WE STARTED OUR TURN LATE, SOCAL CLAIMS THEY HAD A CONFLICT SHOW UP ON THEIR RADAR. WHEN WE ARRIVED IN PSP I WAS ASKED TO CALL SUPVR A AT SOCAL. THE ACR Y ACFT WAS FLYING A LOOP 9 DEP. SUPPLEMENTAL INFO FROM ACN 341120: ACFT X DEPARTED RWY 25R AT LAX. ACFT Y DEPARTED RWY 24L AT LAX. ACFT X WAS ISSUED SEAL BEACH 3 SID, WHICH REQUIRES A L TURN TO HDG 200 DEGS AFTER XING SMO 154 DEG RADIAL. ACFT X DID NOT TURN. ACFT Y WAS IMMEDIATELY N OF ACFT X AT THE SAME ALT. BOTH ACFT WERE HDG 250 DEGS CLBING TO 3000 FT. SUPPLEMENTAL INFO FROM ACN 341113: THE TIMING FOR THIS DEP HAPPENS IN A QUICK SEQUENCE. THE LOW CLOUDS WERE A LARGE FUNCTION OF THE CONFLICT. THE SMO 154 DEG RADIAL ON THE SID IS A VERY NARROW RADIAL BECAUSE OF THE CLOSE PROX OF THE SMO VOR TO THE LAX ARPT. THE CONCERN FOR THE WAKE TURB AND LOSING SIGHT OF AND TRYING TO REGAIN CONTACT ON HIM IS WHAT CAUSED US TO FLY THROUGH THE SMO 154 DEG RADIAL. WITH THE CLEANING UP OF OUR ACFT AND SWITCHING COMS THERE WAS A LOT GOING ON IN A VERY SHORT DISTANCE. ANOTHER PROB IS THAT LAX AND OTHER LARGE ARPTS SQUEEZE VERY CLOSELY ACFT ARRIVING AND DEPARTING.

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.