A300 at FL280 experienced severe turbulence.

Attributes
ACN	569226
Time
Date	200212
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : djb.vortac
State Reference	OH
Altitude	msl bound lower : 28200 msl bound upper : 27800
Environment
Flight Conditions	IMC
Weather Elements	Turbulence
Light	Night
Aircraft 1
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Make Model Name	A300
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Route In Use	enroute airway : j60.airway
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 75 flight time total : 3800 flight time type : 470
ASRS Report	569226
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 155 flight time total : 8200 flight time type : 1100
ASRS Report	570485
Events
Anomaly	altitude deviation : excursion from assigned altitude inflight encounter : turbulence inflight encounter : weather other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to assigned altitude flight crew : regained aircraft control flight crew : exited adverse environment
Supplementary
Problem Areas	Weather
Primary Problem	Weather

Narrative:

When leveling at fl 280, the aircraft encountered severe turbulence. As a result, there was a temporary loss of control of the aircraft at which time the aircraft pitched up violently and climbed to FL282 and down again to FL278. The incident lasted for approximately 1-2 mins. Supplemental information from acn 570485: in order to prevent a repeat occurrence: 1) the autoplt should have been disconnected in this situation in order to deal better with severe turbulence, and 2) the aircraft should have had its speed reduced. In addition, better vigilance and observation of forecast WX could have contributed to avoiding this situation.

Original NASA ASRS Text

Title: A300 AT FL280 EXPERIENCED SEVERE TURB.

Narrative: WHEN LEVELING AT FL 280, THE ACFT ENCOUNTERED SEVERE TURB. AS A RESULT, THERE WAS A TEMPORARY LOSS OF CTL OF THE ACFT AT WHICH TIME THE ACFT PITCHED UP VIOLENTLY AND CLBED TO FL282 AND DOWN AGAIN TO FL278. THE INCIDENT LASTED FOR APPROX 1-2 MINS. SUPPLEMENTAL INFO FROM ACN 570485: IN ORDER TO PREVENT A REPEAT OCCURRENCE: 1) THE AUTOPLT SHOULD HAVE BEEN DISCONNECTED IN THIS SIT IN ORDER TO DEAL BETTER WITH SEVERE TURB, AND 2) THE ACFT SHOULD HAVE HAD ITS SPD REDUCED. IN ADDITION, BETTER VIGILANCE AND OBSERVATION OF FORECAST WX COULD HAVE CONTRIBUTED TO AVOIDING THIS SIT.

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.