Narrative:

Lax tower cleared us to land behind a B757 and added, 'caution, wake turbulence.' as per our flight manual and the aim, we flew above the B757's glide path and landed beyond its touchdown point. As I was lowering the nosewheel to the ground, the tower hurriedly said 'can you make one of the high-speeds?' the first officer, reacting to the implied urgency, replied that we will make taxiway K. I immediately said no, and that we would make taxiway M. The first officer informed the tower. This was immediately after his first reply. I braked and pulled the plane onto high-speed taxiway M, on the right side of runway 25L. As we were crossing the line the tower said, 'turn off left onto A7.' this was impossible to do quickly and we had already jerked the passenger around. The tower, seeing we were already on taxiway M instructed us to pull up as tight as we can behind the first aircraft. A min later the tower said to us that 'when we tell them taxiway K, they plan on that.' we replied that their request was too late. The reason for the tower's panic was that the plane behind us was too close. This plane, was on a visual approach, as we all were. Separation is their responsibility. The tower should have expected our compliance with wake separation procedures after they had issued us the warning. Furthermore, in the perhaps 2 seconds between the first officer's 2 replies, the tower had no time to plan anything at all, but to hope that we could save their day. It seems that lax tower issues these wake turbulence warnings out of habit, but with no thought as to what this requires of the flight crew's.

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Original NASA ASRS Text

Title: SF34 ACR PIC REJECTS LAX TWR REQUEST FOR EARLY RWY TURN OFF DUE TO TFC ON SHORT FINIAL. SF34 FLC HAD JUST ADJUSTED FLT PATH TO ACCOMMODATE WAKE TURB.

Narrative: LAX TWR CLRED US TO LAND BEHIND A B757 AND ADDED, 'CAUTION, WAKE TURB.' AS PER OUR FLT MANUAL AND THE AIM, WE FLEW ABOVE THE B757'S GLIDE PATH AND LANDED BEYOND ITS TOUCHDOWN POINT. AS I WAS LOWERING THE NOSEWHEEL TO THE GND, THE TWR HURRIEDLY SAID 'CAN YOU MAKE ONE OF THE HIGH-SPDS?' THE FO, REACTING TO THE IMPLIED URGENCY, REPLIED THAT WE WILL MAKE TXWY K. I IMMEDIATELY SAID NO, AND THAT WE WOULD MAKE TXWY M. THE FO INFORMED THE TWR. THIS WAS IMMEDIATELY AFTER HIS FIRST REPLY. I BRAKED AND PULLED THE PLANE ONTO HIGH-SPD TXWY M, ON THE R SIDE OF RWY 25L. AS WE WERE XING THE LINE THE TWR SAID, 'TURN OFF L ONTO A7.' THIS WAS IMPOSSIBLE TO DO QUICKLY AND WE HAD ALREADY JERKED THE PAX AROUND. THE TWR, SEEING WE WERE ALREADY ON TXWY M INSTRUCTED US TO PULL UP AS TIGHT AS WE CAN BEHIND THE FIRST ACFT. A MIN LATER THE TWR SAID TO US THAT 'WHEN WE TELL THEM TXWY K, THEY PLAN ON THAT.' WE REPLIED THAT THEIR REQUEST WAS TOO LATE. THE REASON FOR THE TWR'S PANIC WAS THAT THE PLANE BEHIND US WAS TOO CLOSE. THIS PLANE, WAS ON A VISUAL APCH, AS WE ALL WERE. SEPARATION IS THEIR RESPONSIBILITY. THE TWR SHOULD HAVE EXPECTED OUR COMPLIANCE WITH WAKE SEPARATION PROCS AFTER THEY HAD ISSUED US THE WARNING. FURTHERMORE, IN THE PERHAPS 2 SECONDS BTWN THE FO'S 2 REPLIES, THE TWR HAD NO TIME TO PLAN ANYTHING AT ALL, BUT TO HOPE THAT WE COULD SAVE THEIR DAY. IT SEEMS THAT LAX TWR ISSUES THESE WAKE TURB WARNINGS OUT OF HABIT, BUT WITH NO THOUGHT AS TO WHAT THIS REQUIRES OF THE FLC'S.

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.