Right wing outer ground spoiler deployed in-flight.

Attributes
ACN	220433
Time
Date	199209
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : roa
State Reference	VA
Altitude	msl bound lower : 8000 msl bound upper : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : roa
Operator	common carrier : air carrier
Make Model Name	Medium Transport, Low Wing, 2 Turboprop Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 5300 flight time type : 1500
ASRS Report	220433
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	aircraft : equipment problem dissipated flight crew : regained aircraft control
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

We were climbing through 8000 ft (KIAS 145) when there was an uncommanded roll to the left followed by an uncommanded roll to the right with a ground spoiler advisory light on. The PF (first officer) maintained aircraft control while putting in almost full left aileron trim. At the time this happened the IAS went from 145 to 120 immediately. I looked in the checklist for guidance or action to be taken and there was none for ground spoiler deployed in flight! I decided closer to baltimore, md (our destination), that we would do a ctlability check at 5000 ft in the landing confign. However, on descent into bwi at 230 KIAS, the ground spoiler light went out and the aircraft rolled to the left. It seemed as if the ground spoiler had retracted. The rest of the flight proceeded without incident with a normal landing at bwi. After inspection, maintenance determined that the actuator rod had broken off where it joins the ground spoiler. (It was the right outboard spoiler.)

Original NASA ASRS Text

Title: R WING OUTER GND SPOILER DEPLOYED INFLT.

Narrative: WE WERE CLBING THROUGH 8000 FT (KIAS 145) WHEN THERE WAS AN UNCOMMANDED ROLL TO THE L FOLLOWED BY AN UNCOMMANDED ROLL TO THE R WITH A GND SPOILER ADVISORY LIGHT ON. THE PF (FO) MAINTAINED ACFT CTL WHILE PUTTING IN ALMOST FULL L AILERON TRIM. AT THE TIME THIS HAPPENED THE IAS WENT FROM 145 TO 120 IMMEDIATELY. I LOOKED IN THE CHKLIST FOR GUIDANCE OR ACTION TO BE TAKEN AND THERE WAS NONE FOR GND SPOILER DEPLOYED IN FLT! I DECIDED CLOSER TO BALTIMORE, MD (OUR DEST), THAT WE WOULD DO A CTLABILITY CHK AT 5000 FT IN THE LNDG CONFIGN. HOWEVER, ON DSCNT INTO BWI AT 230 KIAS, THE GND SPOILER LIGHT WENT OUT AND THE ACFT ROLLED TO THE L. IT SEEMED AS IF THE GND SPOILER HAD RETRACTED. THE REST OF THE FLT PROCEEDED WITHOUT INCIDENT WITH A NORMAL LNDG AT BWI. AFTER INSPECTION, MAINT DETERMINED THAT THE ACTUATOR ROD HAD BROKEN OFF WHERE IT JOINS THE GND SPOILER. (IT WAS THE R OUTBOARD SPOILER.)

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.