Narrative:

Arriving into lax from the south we were given the oldee one arrival as we approached jli. Upon initial contact with socal approach; we were told to expect runway 25L. Shortly before wyvil we were given a clearance to descend via the oldee arrival. Neither I nor the first officer heard an additional clearance beyond that. The lowest altitude on the oldee arrival is 12000 ft at seavu. As we passed seavu we were expecting a vector or further instructions for the 25L approach. Just as we were about to query the controller; the controller asked if we were intercepting the 25L localizer. The controller then said turn left 220 intercept the 25L localizer and stop your descent at 13000. As we were going through 13000 at the time; we were not able to immediately arrest our decent; however we immediately regained 13000 as we had then heard instructions given to another aircraft at 12000 who was on the approach for 24R at lax. We were subsequently cleared for the 25L approach and landed without further incident. When we contacted ground we were told to contact the socal supervisor by phone. Subsequent phone conversation with the sector supervisor indicated that when we were given the descend via clearance we had been cleared for the 25L approach; though neither I nor the first officer heard that transmission. For our part; we should have queried the controller prior to seavu as to what our clearance was. But the entire incident would probably have been avoided had there been a note on the arrival to expect the seavu transition to ILS 25L or 24R at seavu or an inset depicting those transitions; as was done on the paradise arrival; which has now been discontinued. This would have given us the big picture early on; and also we would have programmed the transition into the FMS in cruise or early in the descent. Finally if the descend via the oldee arrival is meant to include altitudes on the seavu transition for the ILS; then the seavu transitions should be included in the arrival; or the descend via clearance should be stated descend via the oldee arrival and seavu transition for 25L following a clearance that specifically states cleared the ILS 25L approach seavu transition. Given the high volume of traffic into lax; it would seem to be more practical to include the transition on the arrival.

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Original NASA ASRS Text

Title: BE400 flight crew was cleared to descend via the OLDEE 1 arrival to LAX but did not hear a runway assignment the flight crew subsequently overshot Runway 25L LOC conflicting with traffic on Runway 24R.

Narrative: Arriving into LAX from the south we were given the OLDEE ONE arrival as we approached JLI. Upon initial contact with SOCAL Approach; we were told to expect Runway 25L. Shortly before WYVIL we were given a clearance to descend via the OLDEE arrival. Neither I nor the First Officer heard an additional clearance beyond that. The lowest altitude on the OLDEE arrival is 12000 FT at SEAVU. As we passed SEAVU we were expecting a vector or further instructions for the 25L approach. Just as we were about to query the Controller; the Controller asked if we were intercepting the 25L localizer. The Controller then said turn left 220 intercept the 25L localizer and stop your descent at 13000. As we were going through 13000 at the time; we were not able to immediately arrest our decent; however we immediately regained 13000 as we had then heard instructions given to another aircraft at 12000 who was on the approach for 24R at LAX. We were subsequently cleared for the 25L approach and landed without further incident. When we contacted Ground we were told to contact the SOCAL Supervisor by phone. Subsequent phone conversation with the Sector Supervisor indicated that when we were given the descend via clearance we had been cleared for the 25L approach; though neither I nor the First Officer heard that transmission. For our part; we should have queried the controller prior to SEAVU as to what our clearance was. But the entire incident would probably have been avoided had there been a note on the arrival to expect the SEAVU transition to ILS 25L or 24R at SEAVU or an inset depicting those transitions; as was done on the PARADISE arrival; which has now been discontinued. This would have given us the big picture early on; and also we would have programmed the transition into the FMS in cruise or early in the descent. Finally if the descend via the OLDEE arrival is meant to include altitudes on the SEAVU transition for the ILS; then the SEAVU transitions should be included in the arrival; or the descend via clearance should be stated descend via the OLDEE arrival and SEAVU transition for 25L following a clearance that specifically states cleared the ILS 25L approach SEAVU transition. Given the high volume of traffic into LAX; it would seem to be more practical to include the transition on the arrival.

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.