B757 flight crew encountered wake turbulence on departure and delayed turn on charted departure.

Attributes
ACN	747326
Time
Date	200707
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lax.airport
State Reference	CA
Altitude	msl bound lower : 3000 msl bound upper : 5000
Aircraft 1
Controlling Facilities	tracon : sct.tracon tower : sfo.tower
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff
Route In Use	departure sid : laxx5
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 250 flight time total : 18000 flight time type : 2800
ASRS Report	747326
Events
Anomaly	inflight encounter : wake turbulence
Independent Detector	other flight crewa
Resolutory Action	flight crew : exited adverse environment flight crew : regained aircraft control
Supplementary
Problem Areas	Environmental Factor
Primary Problem	Environmental Factor

Narrative:

We took off in an empty plane for ferry from lax. In order to meet at or below restriction on departure I pulled power back and let aircraft accelerate toward 250 KTS. We started the turn at smo 160 radial and began to climb from 3000 to 5000 ft. At that time we encountered very strong and long lasting wake turbulence in the turn. I slowed the plane; leveled the wings to regain control and then continued the turn to 220 degrees. Controller remarked that 'you should have started your turn 3 miles ago.' we replied that we had and were about to roll out on heading. I think our turn was not fast enough to meet her expectations and she perceived that we had not begun it on time due to our wake turbulence encounter. I would call the wake turbulence greater than moderate; it was very violent. I would not have thought twice about this except that the controller asked again 'did you hear me say you started your turn late?' we replied that we had started it on time and were already on the correct heading.

Original NASA ASRS Text

Title: B757 FLT CREW ENCOUNTERED WAKE TURB ON DEP AND DELAYED TURN ON CHARTED DEP.

Narrative: WE TOOK OFF IN AN EMPTY PLANE FOR FERRY FROM LAX. IN ORDER TO MEET AT OR BELOW RESTRICTION ON DEPARTURE I PULLED POWER BACK AND LET ACFT ACCELERATE TOWARD 250 KTS. WE STARTED THE TURN AT SMO 160 RADIAL AND BEGAN TO CLIMB FROM 3000 TO 5000 FT. AT THAT TIME WE ENCOUNTERED VERY STRONG AND LONG LASTING WAKE TURBULENCE IN THE TURN. I SLOWED THE PLANE; LEVELED THE WINGS TO REGAIN CONTROL AND THEN CONTINUED THE TURN TO 220 DEGREES. CONTROLLER REMARKED THAT 'YOU SHOULD HAVE STARTED YOUR TURN 3 MILES AGO.' WE REPLIED THAT WE HAD AND WERE ABOUT TO ROLL OUT ON HEADING. I THINK OUR TURN WAS NOT FAST ENOUGH TO MEET HER EXPECTATIONS AND SHE PERCEIVED THAT WE HAD NOT BEGUN IT ON TIME DUE TO OUR WAKE TURBULENCE ENCOUNTER. I WOULD CALL THE WAKE TURBULENCE GREATER THAN MODERATE; IT WAS VERY VIOLENT. I WOULD NOT HAVE THOUGHT TWICE ABOUT THIS EXCEPT THAT THE CONTROLLER ASKED AGAIN 'DID YOU HEAR ME SAY YOU STARTED YOUR TURN LATE?' WE REPLIED THAT WE HAD STARTED IT ON TIME AND WERE ALREADY ON THE CORRECT HEADING.

Data retrieved from NASA's ASRS site as of January 2009 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.