Narrative:

The lax control tower advised me that we landed on the wrong runway after we were parked at our gate. I never realized until then that we had done something wrong. The situation developed as we were talking to socal approach control. We were arriving lax from the east and, due to an east wind, lax was landing and departing runway 7 and runway 6. WX was good VFR and visual approachs were in use. The wind was reported approximately as 130 degrees or 140 degrees at 20 KTS. About 10 mi east of lax, approach asked us if we had a B757 in sight. We told him we did and he said something like, 'plan to follow the B757.' I also think he said, 'to runway 7R,' I'm not certain. From that point on I was geared to land on runway 7R, even though a few clues to the contrary presented themselves. First, approach pointed us out to another aircraft as landing on runway 7L. Second, we were turned base very close behind the B757. I mentioned to the first officer that I was unsure which runway we were assigned and to check with lax tower. On initial call to the tower, the tower told us to square our turn to final and cleared to land on runway. I thought he said runway 7R, but guess I didn't pay close enough attention. Another clue, he said 'caution wake turbulence departure B747.' well, a B747 was taking off on runway 7L, but I thought the tower was concerned about our spacing with the landing B747 on runway 7R. The B757 cleared runway 7R before we landed on runway 7R. I should have bluntly asked the tower our runway assignment.

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Original NASA ASRS Text

Title: AN ACR MLG CREW LANDED ON THE WRONG RWY. ERROR ADMITTED. MULTIPLE RWY OP, PARALLEL RWYS.

Narrative: THE LAX CTL TWR ADVISED ME THAT WE LANDED ON THE WRONG RWY AFTER WE WERE PARKED AT OUR GATE. I NEVER REALIZED UNTIL THEN THAT WE HAD DONE SOMETHING WRONG. THE SIT DEVELOPED AS WE WERE TALKING TO SOCAL APCH CTL. WE WERE ARRIVING LAX FROM THE E AND, DUE TO AN E WIND, LAX WAS LNDG AND DEPARTING RWY 7 AND RWY 6. WX WAS GOOD VFR AND VISUAL APCHS WERE IN USE. THE WIND WAS RPTED APPROX AS 130 DEGS OR 140 DEGS AT 20 KTS. ABOUT 10 MI E OF LAX, APCH ASKED US IF WE HAD A B757 IN SIGHT. WE TOLD HIM WE DID AND HE SAID SOMETHING LIKE, 'PLAN TO FOLLOW THE B757.' I ALSO THINK HE SAID, 'TO RWY 7R,' I'M NOT CERTAIN. FROM THAT POINT ON I WAS GEARED TO LAND ON RWY 7R, EVEN THOUGH A FEW CLUES TO THE CONTRARY PRESENTED THEMSELVES. FIRST, APCH POINTED US OUT TO ANOTHER ACFT AS LNDG ON RWY 7L. SECOND, WE WERE TURNED BASE VERY CLOSE BEHIND THE B757. I MENTIONED TO THE FO THAT I WAS UNSURE WHICH RWY WE WERE ASSIGNED AND TO CHK WITH LAX TWR. ON INITIAL CALL TO THE TWR, THE TWR TOLD US TO SQUARE OUR TURN TO FINAL AND CLRED TO LAND ON RWY. I THOUGHT HE SAID RWY 7R, BUT GUESS I DIDN'T PAY CLOSE ENOUGH ATTN. ANOTHER CLUE, HE SAID 'CAUTION WAKE TURB DEP B747.' WELL, A B747 WAS TAKING OFF ON RWY 7L, BUT I THOUGHT THE TWR WAS CONCERNED ABOUT OUR SPACING WITH THE LNDG B747 ON RWY 7R. THE B757 CLRED RWY 7R BEFORE WE LANDED ON RWY 7R. I SHOULD HAVE BLUNTLY ASKED THE TWR OUR RWY ASSIGNMENT.

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.