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Also, LNAV was engaged and the aircraft centered in the flight director bars before
autopilot engagement. Within seconds of engaging the autopilot, the aircraft
started rolling moderately fast to the left. The Captain immediately disconnected
the autopilot, rolled the aircraft back to wings level, and simultaneously pushed up
the thrust levers to regain control of the aircraft. Control was regained quickly, and
with both engines operating normally, he reduced power back to the predetermined
limit. Maybe insist on more separation behind Airbus and/or B757
aircraft at SNA even if it causes us to miss a controlled departure time.
Synopsis
A wake turbulence encounter behind a preceding Airbus causes a B737 to
temporarily abandon a special noise abatement departure procedure in order to
recover.
ACN: 816459 (39 of 50)
Time / Day
Date : 200812
Local Time Of Day : 0601-1200
Place
Locale Reference.Airport : PHX.Airport
State Reference : AZ
Altitude.AGL.Single Value : 1500
Environment
Flight Conditions : VMC
Light : Daylight
Aircraft : 1
Reference : X
ATC / Advisory.Tower : PHX.Tower
Aircraft Operator : Air Carrier
Make Model Name : Regional Jet 200 ER/LR (CRJ200)
Crew Size.Number Of Crew : 2
Operating Under FAR Part : Part 121
Flight Plan : IFR
Mission : Passenger
Flight Phase : Initial Climb
Airspace.Class B : PHX.B
Aircraft : 2
Reference : Y
ATC / Advisory.Tower : PHX.Tower
Aircraft Operator : Air Carrier
Make Model Name : Airbus Industrie Undifferentiated or Other Model
Crew Size.Number Of Crew : 2
Operating Under FAR Part : Part 121
Flight Plan : IFR
Mission : Passenger
Flight Phase : Climb
Airspace.Class B : PHX.B
Person
Reference : 1
Location Of Person.Aircraft : X
Reporter Organization : Air Carrier
Function.Flight Crew : Captain
Qualification.Flight Crew : Air Transport Pilot (ATP)
Qualification.Flight Crew : Commercial
Experience.Flight Crew.Total : 5000
Experience.Flight Crew.Last 90 Days : 150
Experience.Flight Crew.Type : 3000
ASRS Report Number.Accession Number : 816459
Events
Anomaly.ATC Issue : All Types
Anomaly.Inflight Event / Encounter : Wake Vortex Encounter
Detector.Person : Flight Crew
Result.General : None Reported / Taken
Assessments
Contributing Factors / Situations : Human Factors
Contributing Factors / Situations : Airport
Primary Problem : Ambiguous
Narrative: 1
AFTER TAKE-OFF BEHIND AN AIRBUS, WE EXPERIENCED WAKE TURBULENCE
AFTER ACCELERATION ALTITUDE OF 1000 FT AGL. WAKE TURBULENCE WAS LIGHT
TO MODERATE, WE RECEIVED A STICK-SHAKER/STALL WARNING THAT LASTED
APPROXIMATELY 1 SECOND. WE WERE IN A CLIMB OF APPROX 1000 FPM AND DID
NOT EXPERIENCE ANY LOSS OF SEPARATION OR LOSS OF AIRCRAFT CONTROL.
WHAT CAUSED THE PROBLEM: 1) FAILURE TO FLY THE AIRPLANE AT A PROFILE
THAT WOULD BEST AVOID THIS EVENT. 2) LACK OF ADEQUATE SEPARATION BY
ATC/TOWER -- WE WERE CLEARED FOR TAKEOFF. 3) FLEX THRUST. FLEX THRUST
WAS USED. IN RETROSPECT, IT MAY HAVE BEEN ADVANTAGEOUS TO TAKE-OFF
WITH FULL POWER IN ORDER TO GAIN THE BENEFITS OF AN INCREASED CLIMB
RATE AND AN EARLIER VR POINT ON THE RUNWAY. WHAT CAN PREVENT THE
PROBLEM: 1) INSIST ON MORE SEPARATION FROM LARGER AIRCRAFT PRIOR TO
BEING PUT IN TAKE-OFF SEQUENCE. 2) FULL POWER TAKE-OFF WHEN
OPERATIONALLY FEASIBLE.
Synopsis
A CRJ-200 PILOT REPORTS LIGHT TO MODERATE WAKE VORTEX INCLUDING A
STALL WARNING AND STICK SHAKER FOR 1 SECOND AT 1000 FT AFTER TAKEOFF
BEHIND AN A320 AIRCRAFT.
ACN: 814422 (40 of 50)
Time / Day
Date : 200812
Local Time Of Day : 1201-1800
Place
Locale Reference.Airport : CLT.Airport
State Reference : NC
Altitude.MSL.Single Value : 3000
Environment
Weather Elements / Visibility.Visibility : 20.0
Weather Elements / Visibility.Other
Light : Daylight
Aircraft
Reference : X
ATC / Advisory.TRACON : CLT.TRACON
Aircraft Operator : Air Carrier
Make Model Name : B737 Undifferentiated or Other Model
Crew Size.Number Of Crew : 2
Operating Under FAR Part : Part 121
Flight Plan : IFR
Mission : Passenger
Flight Phase : Initial Approach
Person
Reference : 1
Location Of Person.Aircraft : X
Reporter Organization : Air Carrier
Function.Flight Crew : Captain
Function.Flight Crew : Pilot Flying
Qualification.Flight Crew : Air Transport Pilot (ATP)
ASRS Report Number.Accession Number : 814422
Events
Anomaly.Inflight Event / Encounter : Loss Of Aircraft Control
Anomaly.Inflight Event / Encounter : Wake Vortex Encounter
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