Narrative:

On the mitts 1 arrival into lax. Frequency change from 124.22 to socal approach frequency 128.5. Attempted to check in on the frequency for approach, controller was making continuous xmissions to other aircraft. (There was a time lapse before we tried to check in on frequency 128.5, as we switched to a wrong frequency before.) finally, we were able to get acknowledgment from controller, at which time he told us to slow down to final approach speed (we were assigned 250 KTS from the previous controller). Shortly after, we were told to climb to 4000 ft MSL and track the localizer inbound. Controller then switched us to another controller to handle us on a go around. Due to the congestion on the approach control frequency we were not able to get acknowledged that we were on the ILS approach. This caused a surprise to the controller and a go around in the approach had to be executed (directed by controller).

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Original NASA ASRS Text

Title: AN A320 ON APCH TO LAX WAS MISIDENTED BY APCH CTLR AND EVENTUALLY GIVEN A CLB AND VECTORS FOR A MISSED APCH AND ANOTHER APCH.

Narrative: ON THE MITTS 1 ARR INTO LAX. FREQ CHANGE FROM 124.22 TO SOCAL APCH FREQ 128.5. ATTEMPTED TO CHK IN ON THE FREQ FOR APCH, CTLR WAS MAKING CONTINUOUS XMISSIONS TO OTHER ACFT. (THERE WAS A TIME LAPSE BEFORE WE TRIED TO CHK IN ON FREQ 128.5, AS WE SWITCHED TO A WRONG FREQ BEFORE.) FINALLY, WE WERE ABLE TO GET ACKNOWLEDGMENT FROM CTLR, AT WHICH TIME HE TOLD US TO SLOW DOWN TO FINAL APCH SPD (WE WERE ASSIGNED 250 KTS FROM THE PREVIOUS CTLR). SHORTLY AFTER, WE WERE TOLD TO CLB TO 4000 FT MSL AND TRACK THE LOC INBOUND. CTLR THEN SWITCHED US TO ANOTHER CTLR TO HANDLE US ON A GAR. DUE TO THE CONGESTION ON THE APCH CTL FREQ WE WERE NOT ABLE TO GET ACKNOWLEDGED THAT WE WERE ON THE ILS APCH. THIS CAUSED A SURPRISE TO THE CTLR AND A GAR IN THE APCH HAD TO BE EXECUTED (DIRECTED BY CTLR).

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.