Air carrier large transport in-flight encounter with wake turbulence.

Attributes
ACN	191517
Time
Date	199110
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : clt
State Reference	NC
Altitude	msl bound lower : 2400 msl bound upper : 2700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : clt
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 50 flight time total : 7500
ASRS Report	191517
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude inflight encounter other other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Flight chs-clt. WX well above VFR. I as first officer was flying and was cleared to maintain 2700 ft till lecar (7.1 DME from clt) cleared for back course 23 clt -- 8 in trail of company large transport. At 2700 MSL about 9 mi from clt we encountered vortex from proceeding aircraft that caused a roll to left that required almost full counter control and almost maximum power for about 5-6 seconds. Airspeed loss was about 15 KTS. Altitude deviation of maybe 300 ft low at lecar. Wind was 150 at 6.

Original NASA ASRS Text

Title: ACR LGT INFLT ENCOUNTER WITH WAKE TURB.

Narrative: FLT CHS-CLT. WX WELL ABOVE VFR. I AS FO WAS FLYING AND WAS CLRED TO MAINTAIN 2700 FT TILL LECAR (7.1 DME FROM CLT) CLRED FOR BACK COURSE 23 CLT -- 8 IN TRAIL OF COMPANY LGT. AT 2700 MSL ABOUT 9 MI FROM CLT WE ENCOUNTERED VORTEX FROM PROCEEDING ACFT THAT CAUSED A ROLL TO L THAT REQUIRED ALMOST FULL COUNTER CTL AND ALMOST MAX PWR FOR ABOUT 5-6 SECONDS. AIRSPD LOSS WAS ABOUT 15 KTS. ALTDEV OF MAYBE 300 FT LOW AT LECAR. WIND WAS 150 AT 6.

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.