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right for a total change of 20 degrees. The roll was very sudden and forceful. Both
aircraft were climbing on a very accurate RNAV departure. The wake must not have
dissipated adequately prior to our arrival at the point in space and altitude. I kept
the wings level and kept climbing to the assigned altitude of 14000. The Captain
made PA to keep the passengers informed.
Synopsis
CRJ200 First Officer experienced wake turbulence from preceding MD90 over
KLEGG intersection during the GEETK5 RNAV departure from ATL.
ACN: 838513 (18 of 50)
Time / Day
Date : 200906
Local Time Of Day : 1801-2400
Place
Locale Reference.ATC Facility : ZDC.ARTCC
State Reference : VA
Altitude.MSL.Single Value : 23000
Environment
Flight Conditions : VMC
Light : Daylight
Aircraft
Reference : X
Aircraft Operator : Air Carrier
Make Model Name : EMB ERJ 170/175 ER&LR
Crew Size.Number Of Crew : 2
Operating Under FAR Part : Part 121
Flight Plan : IFR
Mission : Passenger
Flight Phase : Climb
Person : 1
Reference : 1
Location Of Person.Aircraft : X
Location In Aircraft : Flight Deck
Reporter Organization : Air Carrier
Function.Flight Crew : Captain
Function.Flight Crew : Pilot Flying
ASRS Report Number.Accession Number : 838513
Person : 2
Reference : 2
Location Of Person.Aircraft : X
Location In Aircraft : Flight Deck
Reporter Organization : Air Carrier
Function.Flight Crew : First Officer
Function.Flight Crew : Pilot Not Flying
Events
Anomaly.Inflight Event / Encounter : Wake Vortex Encounter
Detector.Person : Flight Crew
Were Passengers Involved In Event : Y
When Detected : In-flight
Result.Flight Crew : Regained Aircraft Control
Result.Flight Crew : Requested ATC Assistance / Clarification
Result.Air Traffic Control : Issued New Clearance
Assessments
Contributing Factors / Situations : Procedure
Contributing Factors / Situations : Airspace Structure
Primary Problem : Ambiguous
Narrative: 1
While en-route, we were warned of possible wake-turbulence from 747 ahead of us.
My First Officer and I acknowledged. Up to this point we had a smooth ride. We
were level at FL230 when the aircraft sharply rolled to the left. I would say
somewhere in the 60 degree range. It was very intense, the autopilot never
disengaged and rolled itself level again. Due to the severity of the situation, my
First Officer asked for an immediate deviation off course due to severe turbulence
from the 747's wake. We were then given a heading and later asked if we could
return on course. We asked ATC if the 747 was on the same route as we were and
ATC verified that. We said unable and asked to parallel the course until we had
more separation. We were granted that request and then eventually given direct as
the 747 turned off course. After my First Officer and I got things situated in the
cockpit with our routing and ensuring that we were out of the 747's wake, I spoke
with my flight attendants and made an announcement to the passengers to ensure
them that everything was ok. I checked in with my flight attendants to ensure
everyone was ok twice more before the flight was over. I was told that one girl had
gotten coffee spilled all over her shirt. Thankfully the flight attendants were not
hurt and nobody else was standing at the time of the incident. I sent and ACARS to
dispatched informing them of the situation and asked them to inform the Customer
Service Agent at the gate that we may have some passengers that were shaken up
by the experience and one customer with coffee stains on her shirt. Nobody was
injured. Once we landed, tower gave us two numbers for ATC and informed us that
we were to call them. I greeted all the passengers off the aircraft to be sure
everyone was ok and spoke to the young lady that had coffee on her. She assured
me she was ok, needed no medical attention and was not concerned with the coffee
on her shirt.
Synopsis
An ERJ-170 encountered wake turbulence 9.5 MI behind and 3,300 FT lower than a
B747 causing a 60 degree bank.
ACN: 838082 (19 of 50)
Time / Day
Date : 200905
Local Time Of Day : 0601-1200
Place
Locale Reference.Airport : LAX.Airport
State Reference : CA
Environment
Flight Conditions : IMC
Light : Night
Aircraft
Reference : X
ATC / Advisory.TRACON : SCT
Aircraft Operator : Air Carrier
Make Model Name : B737-700
Crew Size.Number Of Crew : 2
Operating Under FAR Part : Part 121
Flight Plan : IFR
Flight Phase : Initial Approach
Route In Use.STAR : SEAVU TWO
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