A B737-700 experienced wake turbulence in trail behind a B757 on approach to lax. They executed a go around and ATC cleared them for another approach.

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Attributes
ACN	704730
Time
Date	200607
Local Time Of Day	1201 To 1800
Place
Locale Reference	intersection : jetsa
State Reference	CA
Altitude	msl single value : 2000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : lax.tower tower : jnu.tower
Operator	common carrier : air carrier
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 24r
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : lax.tower
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 24r
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 240 flight time type : 1000
ASRS Report	704730
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	inflight encounter : wake turbulence
Resolutory Action	controller : issued new clearance flight crew : executed go around
Supplementary
Problem Areas	Environmental Factor
Primary Problem	Environmental Factor

Narrative:

Encountered wake turbulence over jetsa at 5.5 mi behind a heavy B757 on ILS approach to runway 24R at lax. Aircraft rolled 30 degrees to the right and autoplt could not control the aircraft. Disconnected the autoplt to recover and ATC subsequently broke us out for another approach. Increase spacing requirements behind heavy aircraft.

Original NASA ASRS Text

Title: A B737-700 EXPERIENCED WAKE TURB IN TRAIL BEHIND A B757 ON APCH TO LAX. THEY EXECUTED A GAR AND ATC CLRED THEM FOR ANOTHER APCH.

Narrative: ENCOUNTERED WAKE TURB OVER JETSA AT 5.5 MI BEHIND A HVY B757 ON ILS APCH TO RWY 24R AT LAX. ACFT ROLLED 30 DEGS TO THE R AND AUTOPLT COULD NOT CTL THE ACFT. DISCONNECTED THE AUTOPLT TO RECOVER AND ATC SUBSEQUENTLY BROKE US OUT FOR ANOTHER APCH. INCREASE SPACING REQUIREMENTS BEHIND HVY ACFT.

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.