Air carrier on climb encounters severe clear air turbulence. Descends to smooth air.

Attributes
ACN	195153
Time
Date	199111
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : dxo
State Reference	MI
Altitude	msl bound lower : 14000 msl bound upper : 18000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 105 flight time total : 14000 flight time type : 650
ASRS Report	195153
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument pilot : commercial
Experience	flight time last 90 days : 200 flight time total : 8800 flight time type : 2600
ASRS Report	195165
Events
Anomaly	inflight encounter other
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control other
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	other

Narrative:

Prior to departure, turbulence was reported light to moderate south of detroit metropolitan airport. After takeoff we were given clearance to climb to 240. Climbing through 180 we encountered severe turbulence in clear air. The airplane was being flown by flight guidance system and began rolling violently left and right. The captain disengaged the autoplt simultaneously pushing nose over to 6 degrees below horizon trying to descend airplane below turbulence. The airplane continued to climb for a min and then descended. We were given new clearance to descend to 14000 ft. The air smoothed out as we descended. All passenger and flight attendants were buckled in and there were no reported injuries.

Original NASA ASRS Text

Title: ACR ON CLB ENCOUNTERS SEVERE CLR AIR TURB. DSNDS TO SMOOTH AIR.

Narrative: PRIOR TO DEP, TURB WAS RPTED LIGHT TO MODERATE S OF DETROIT METRO ARPT. AFTER TKOF WE WERE GIVEN CLRNC TO CLB TO 240. CLBING THROUGH 180 WE ENCOUNTERED SEVERE TURB IN CLR AIR. THE AIRPLANE WAS BEING FLOWN BY FLT GUIDANCE SYS AND BEGAN ROLLING VIOLENTLY L AND R. THE CAPT DISENGAGED THE AUTOPLT SIMULTANEOUSLY PUSHING NOSE OVER TO 6 DEGS BELOW HORIZON TRYING TO DSND AIRPLANE BELOW TURB. THE AIRPLANE CONTINUED TO CLB FOR A MIN AND THEN DSNDED. WE WERE GIVEN NEW CLRNC TO DSND TO 14000 FT. THE AIR SMOOTHED OUT AS WE DSNDED. ALL PAX AND FLT ATTENDANTS WERE BUCKLED IN AND THERE WERE NO RPTED INJURIES.

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.