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L1011 PIC acknowledges ATC clearance for another aircraft. Lax controller required to issue immediate turn to avoid conflict with other traffic. PIC establishes cause of readback error as frequency congestion.
| Attributes | |
| ACN | 428080 |
| Time | |
| Date | 199902 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : lax.airport |
| State Reference | CA |
| Altitude | msl single value : 7000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | L-1011 Tri-Star All Series |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 25r |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 18200 flight time type : 1200 |
| ASRS Report | 428080 |
| Person 2 | |
| Affiliation | company : air carrier |
| Qualification | pilot : multi engine pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : clearance other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance controller : separated traffic |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were being radar vectored by socal approach control on downwind for runway 25R. I understood the controller to say that we were to turn to an assigned heading to intercept the localizer for the approach. I repeated the instructions over the radio and the first officer (PF) turned the aircraft. As I made my readback over the radio to the controller, my transmission was blocked by another aircraft. Shortly, the ATC controller asked us what our heading was. He then instructed us to make an immediate turn to the left, which we did. The instructions to turn to intercept the approach had not been for our aircraft. Radio congestion was definitely the cause of this event.
Original NASA ASRS Text
Title: L1011 PIC ACKNOWLEDGES ATC CLRNC FOR ANOTHER ACFT. LAX CTLR REQUIRED TO ISSUE IMMEDIATE TURN TO AVOID CONFLICT WITH OTHER TFC. PIC ESTABLISHES CAUSE OF READBACK ERROR AS FREQ CONGESTION.
Narrative: WE WERE BEING RADAR VECTORED BY SOCAL APCH CTL ON DOWNWIND FOR RWY 25R. I UNDERSTOOD THE CTLR TO SAY THAT WE WERE TO TURN TO AN ASSIGNED HDG TO INTERCEPT THE LOC FOR THE APCH. I REPEATED THE INSTRUCTIONS OVER THE RADIO AND THE FO (PF) TURNED THE ACFT. AS I MADE MY READBACK OVER THE RADIO TO THE CTLR, MY XMISSION WAS BLOCKED BY ANOTHER ACFT. SHORTLY, THE ATC CTLR ASKED US WHAT OUR HDG WAS. HE THEN INSTRUCTED US TO MAKE AN IMMEDIATE TURN TO THE L, WHICH WE DID. THE INSTRUCTIONS TO TURN TO INTERCEPT THE APCH HAD NOT BEEN FOR OUR ACFT. RADIO CONGESTION WAS DEFINITELY THE CAUSE OF THIS EVENT.
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.