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Flight Plan : IFR
Nav In Use.Localizer/Glideslope/ILS : ILS PRM 28L
Flight Phase : Final Approach
Airspace.Class B : SFO
Person
Reference : 1
Location Of Person.Aircraft : X
Location In Aircraft : Flight Deck
Reporter Organization : Air Carrier
Function.Flight Crew : Captain
Function.Flight Crew : Pilot Not Flying
Qualification.Flight Crew : Air Transport Pilot (ATP)
ASRS Report Number.Accession Number : 846919
Events
Anomaly.Inflight Event / Encounter : Wake Vortex Encounter
Anomaly.Inflight Event / Encounter : Loss Of Aircraft Control
Detector.Person : Flight Crew
When Detected : In-flight
Result.Flight Crew : Regained Aircraft Control
Result.Flight Crew : Executed Go Around / Missed Approach
Assessments
Contributing Factors / Situations : Procedure
Contributing Factors / Situations : Environment - Non Weather Related
Contributing Factors / Situations : Aircraft
Primary Problem : Ambiguous
Narrative: 1
We were executing the LDA PRM 28R approach to SFO 2 miles behind a 747 on the
ILS PRM 28L. We broke out above MDA with the runway and preceding aircraft in
sight and received clearance to land. We proceeded along the approach path to the
runway and at 300 FT AGL, we encountered wake turbulence that suddenly and
rapidly rolled the aircraft into 30 degrees left bank. We recovered the aircraft and
executed a go-around. We returned for an uneventful ILS PRM 28L approach and
landing. This event occurred because the spacing between a heavy and large
aircraft executing PRM approaches to SFO may have been too close.
Synopsis
B737 Captain landing Runway 28R reported encountering wake turbulence from
preceding B747 landing Runway 28L at 300 FT AGL. After recovering from a sharp
roll to the left the crew executed a go-around.
ACN: 844719 (7 of 50)
Time / Day
Date : 200907
Local Time Of Day : 0601-1200
Place
Locale Reference.ATC Facility : ZZZ.ARTCC
State Reference : US
Altitude.MSL.Single Value : 10000
Environment
Flight Conditions : VMC
Weather Elements / Visibility : Turbulence
Weather Elements / Visibility.Visibility : 10
Light : Daylight
Ceiling.Single Value : 12000
Aircraft
Reference : X
ATC / Advisory.Center : ZZZ
Aircraft Operator : Personal
Make Model Name : King Air C90 E90
Crew Size.Number Of Crew : 2
Operating Under FAR Part : Part 91
Flight Plan : IFR
Mission : Training
Flight Phase : Climb
Airspace.Class E : ZZZ
Person
Reference : 1
Location Of Person.Aircraft : X
Location In Aircraft : Flight Deck
Reporter Organization : Air Carrier
Function.Flight Crew : Pilot Not Flying
Function.Flight Crew : Captain
Qualification.Flight Crew : Flight Instructor
Qualification.Flight Crew : Air Transport Pilot (ATP)
Experience.Flight Crew.Total : 14000
Experience.Flight Crew.Last 90 Days : 50
Experience.Flight Crew.Type : 2400
ASRS Report Number.Accession Number : 844719
Human Factors : Situational Awareness
Human Factors : Training / Qualification
Events
Anomaly.Deviation - Altitude : Excursion From Assigned Altitude
Anomaly.Deviation - Procedural : Clearance
Anomaly.Inflight Event / Encounter : Wake Vortex Encounter
Detector.Person : Flight Crew
Detector.Person : Air Traffic Control
When Detected : In-flight
Result.Flight Crew : Returned To Clearance
Result.Flight Crew : Regained Aircraft Control
Result.Flight Crew : Became Reoriented
Assessments
Contributing Factors / Situations : Weather
Contributing Factors / Situations : Human Factors
Primary Problem : Ambiguous
Narrative: 1
Enroute, allowed First Officer to hand fly aircraft, he leveled off at 10,000 FT
(assigned by Air Traffic Control). While accelerating we hit some turbulence (I think
is was wake turbulence) and lost 300 FT of altitude. After repeating altitude call
outs, I took the aircraft and climbed back to altitude. Center repeated 10,000 FT
assignment and I acknowledged altitude.
Synopsis
A BE-90 encountered wake turbulence while the First Officer hand flew the aircraft.
The aircraft lost 300 FT before ATC reminded them and they resumed to the
cleared altitude.
ACN: 844596 (8 of 50)
Time / Day
Date : 200907
Local Time Of Day : 1201-1800
Place
Locale Reference.Intersection : SADDE
State Reference : CA
Relative Position.Angle.Radial : 360
Relative Position.Distance.Nautical Miles : 1
Altitude.MSL.Single Value : 10000
Environment
Flight Conditions : VMC
Light : Daylight
Aircraft
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