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Assessments
Contributing Factors / Situations : Procedure
Contributing Factors / Situations : Environment - Non Weather Related
Contributing Factors / Situations : Airspace Structure
Primary Problem : Procedure
Narrative: 1
We arrived on the SADDE 6 Arrival at the DERBB waypoint. After Filmore VOR ATC
placed us on a series of headings to descend down to 10000 FT. After we were put
back on the arrival the airplane required a sharp left turn to intercept the course
after SADDE (Not a flyover point). This sharp turn resulted in not to reaching
SADDE intersection so as to intercept the arrival course properly to BAYST
waypoint. Apparently this sharp turn placed our airplane a couple miles behind an
airliner (we believe it was a 757). ATC had us slow immediately to 180 KTS. As
soon as we slowed to 180 KTS, the aircrafts right wing abruptly dropped (aircraft
was at flaps 15). Pilot flying added full power to recover. ATC gave us a descent to
6000 FT (I believe), and again told us to slow to 180 KTS. Again at exactly 180 KTS
our right wing dropped and flying pilot recovered with full power. We immediately
informed approach that the slowest we could give them was 190 KTS, we were
encountering wake turbulence. At both times when the wing dropped the AOA
indicator did not reflect any movement and there was no stick shaker. I assumed
the problem was the 757 only a couple miles ahead and TCAS showing 300 FT
below us. During the recovery procedures, the flying pilot clicked off the autopilot.
After getting the airplane stabilized back at 10,200 FT we kept the airspeed at 190
KTS and started again with our descent down to 6000 FT. Then another approach
controller took over, and changed our runway from 24R to 25L and gave us a series
of heading and altitude changes and 5 miles behind a MD-80, which was more
manageable. This scenario was frustrating in that we could not make the airplane
do what we wanted it to because it would stop flying. At those moments we were
too busy flying the airplane to talk with approach to tell them what we were
fighting. The frequency was so busy that we probably could not tell them if we
wanted. Also this entire descent and approach was not in normal aircraft profile
that we fly everyday, which is normally no big deal until you start throwing in
aircraft upset scenarios.
Synopsis
A CE-680 on the LAX SADDE 6 encountered several wake vortex upsets behind a
B757. Unable to contact ATC due to flying duties and radio traffic, the crew had
difficulty taking action to avoid the wake while following ATC instructions.
ACN: 839773 (17 of 50)
Time / Day
Date : 200906
Local Time Of Day : 1201-1800
Place
Locale Reference.Airport : ATL.Airport
State Reference : GA
Environment
Flight Conditions : VMC
Light : Daylight
Aircraft : 1
Reference : X
ATC / Advisory.TRACON : A80
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
Nav In Use : FMS Or FMC
Flight Phase : Climb
Route In Use.SID : GEETK
Airspace.Class B : ATL
Aircraft : 2
Reference : Y
ATC / Advisory.Tower : ATL
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 : Climb
Airspace.Class B : ATL
Person
Reference : 1
Location Of Person.Aircraft : X
Location In Aircraft : Flight Deck
Reporter Organization : Air Carrier
Function.Flight Crew : First Officer
Function.Flight Crew : Pilot Flying
Qualification.Flight Crew : Multiengine
Qualification.Flight Crew : Commercial
Experience.Flight Crew.Total : 2800
Experience.Flight Crew.Last 90 Days : 230
Experience.Flight Crew.Type : 2500
ASRS Report Number.Accession Number : 839773
Events
Anomaly.Inflight Event / Encounter : Wake Vortex Encounter
Detector.Person : Flight Crew
When Detected : In-flight
Result.Flight Crew : Regained Aircraft Control
Assessments
Contributing Factors / Situations : Weather
Contributing Factors / Situations : Airspace Structure
Primary Problem : Ambiguous
Narrative: 1
Climbing out of ATL on the GEETK 5 departure, behind an MD-90, encountered
wake turbulence over KLEGG waypoint. Took off from 8R at 42000 LBS, I was the
pilot flying with the flight director and no autopilot. Wind was 3004/19 KTS at
KLEGG. We encountered a very sudden roll of about 10 degrees left then ten to the
　
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