Turboprop aircraft encounters wake turbulence following 2 B757 aircraft to parallel runways.

Attributes
ACN	452336
Time
Date	199910
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lax.airport
Altitude	msl single value : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : lax.tower
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	approach : visual 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	other
Flight Phase	descent : approach
Route In Use	approach : visual approach : instrument precision
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp
Experience	flight time last 90 days : 200 flight time total : 17000 flight time type : 4200
ASRS Report	452336
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Events
Anomaly	inflight encounter : wake turbulence other anomaly other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control flight crew : exited adverse environment
Supplementary
Problem Areas	Environmental Factor Aircraft ATC Human Performance Airspace Structure
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Landing runway 25L, a B757 landing runway 25R and a B757 preceding us to runway 25L. The B757 on runway 25R was about 1/2 mi ahead of us and very high on his approach. I flew 1 1/2 dots high on GS and offset to the south of the localizer by about 1/4 mi to avoid wake but still hit strong wake rolling my aircraft approximately 60-70 degrees to the left requiring full aileron to avoid inverted flight.

Original NASA ASRS Text

Title: TURBOPROP ACFT ENCOUNTERS WAKE TURB FOLLOWING 2 B757 ACFT TO PARALLEL RWYS.

Narrative: LNDG RWY 25L, A B757 LNDG RWY 25R AND A B757 PRECEDING US TO RWY 25L. THE B757 ON RWY 25R WAS ABOUT 1/2 MI AHEAD OF US AND VERY HIGH ON HIS APCH. I FLEW 1 1/2 DOTS HIGH ON GS AND OFFSET TO THE S OF THE LOC BY ABOUT 1/4 MI TO AVOID WAKE BUT STILL HIT STRONG WAKE ROLLING MY ACFT APPROX 60-70 DEGS TO THE L REQUIRING FULL AILERON TO AVOID INVERTED FLT.

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.