During high altitude climb large transport experiences severe wake turbulence suspected to be caused...

Attributes
ACN	274557
Time
Date	199406
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : obh
State Reference	NE
Altitude	msl bound lower : 34500 msl bound upper : 34500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zmp
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B747 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 150 flight time total : 14000 flight time type : 10000
ASRS Report	274557
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : instrument pilot : commercial pilot : cfi pilot : atp
Experience	flight time last 90 days : 200 flight time total : 6000 flight time type : 1500
ASRS Report	274697
Events
Anomaly	inflight encounter other other anomaly other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control none taken : anomaly accepted
Consequence	faa : reviewed incident with flight crew
Supplementary
Air Traffic Incident	other

Narrative:

Climbing in the clear, in smooth air, we encountered 2 almost simultaneous jolts of severe turbulence. Suspect wake turbulence from a 747. ATC reported a 747 had climbed through that area several mins before.

Original NASA ASRS Text

Title: DURING HIGH ALT CLB LGT EXPERIENCES SEVERE WAKE TURB SUSPECTED TO BE CAUSED BY A PRECEDING B747.

Narrative: CLBING IN THE CLR, IN SMOOTH AIR, WE ENCOUNTERED 2 ALMOST SIMULTANEOUS JOLTS OF SEVERE TURB. SUSPECT WAKE TURB FROM A 747. ATC RPTED A 747 HAD CLBED THROUGH THAT AREA SEVERAL MINS BEFORE.

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.

During high altitude climb large transport experiences severe wake turbulence suspected to be caused by a preceding B747.