Aircraft equipment problem. Uncommanded roll.

Attributes
ACN	312239
Time
Date	199508
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : srq
State Reference	FL
Altitude	msl bound lower : 31000 msl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	enroute airway : zjx
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : flight engineer
Experience	flight time last 90 days : 220 flight time total : 10000 flight time type : 7200
ASRS Report	312239
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 12000 flight time type : 4000
ASRS Report	312146
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : overcame equipment problem flight crew : regained aircraft control
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

We had deviated south of course for WX past covia and were in the clear, beginning a right turn to rejoin J-86. Aircraft began to oscillate on roll axis plus or minus 20 degrees. Disconnected autoplt and yaw damper, advised ATC of control problem and requested descent. ATC cleared us for descent to FL310. Oscillation continued through FL330. We leveled at FL310, re-engaged autoplt and yaw damper. No further problems throughout flight (approximately 1 hour 15 mins). Logbook write up was made in iah. Callback conversation with reporter revealed the following information: callback in conjunction with turbojet upset incident callback questionnaire.

Original NASA ASRS Text

Title: ACFT EQUIP PROB. UNCOMMANDED ROLL.

Narrative: WE HAD DEVIATED S OF COURSE FOR WX PAST COVIA AND WERE IN THE CLR, BEGINNING A R TURN TO REJOIN J-86. ACFT BEGAN TO OSCILLATE ON ROLL AXIS PLUS OR MINUS 20 DEGS. DISCONNECTED AUTOPLT AND YAW DAMPER, ADVISED ATC OF CTL PROB AND REQUESTED DSCNT. ATC CLRED US FOR DSCNT TO FL310. OSCILLATION CONTINUED THROUGH FL330. WE LEVELED AT FL310, RE-ENGAGED AUTOPLT AND YAW DAMPER. NO FURTHER PROBS THROUGHOUT FLT (APPROX 1 HR 15 MINS). LOGBOOK WRITE UP WAS MADE IN IAH. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: CALLBACK IN CONJUNCTION WITH TURBOJET UPSET INCIDENT CALLBACK QUESTIONNAIRE.

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.