Large transport involuntary rolls when the spoilers are used.

Attributes
ACN	296764
Time
Date	199502
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : pwe
State Reference	NE
Altitude	msl bound lower : 17000 msl bound upper : 17000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	enroute airway : zkc
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 185 flight time total : 15000 flight time type : 2000
ASRS Report	296764
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During descent into mci in order to comply with an ATC crossing restr over pne the first officer (flying) activated the flight spoilers and immediately encountered an uncommanded roll to the right. The roll was ctlable with control wheel force to the left and the tendency was eliminated by placing the spoilers back to the down position. A normal approach and landing was made to mci runway 01L with a left crosswind until the spoilers were raised during rollout. The aircraft was grounded and mechanics re-rigged the aileron input into the spoiler mixer. The following morning the aircraft was scheduled for us to fly on another revenue flight to atl. After a thorough functional flight controls check on the ground, the scheduled flight was conducted. All was normal until on downwind leg, I raised the spoilers and this time the aircraft rolled to the right. The condition was again written up and apparently corrected by a similar rerigging of aileron input to the spoiler mixer. The aircraft was being hand flown each time the incidents occurred. I am concerned that, had the autoplt been engaged, a more rapid roll might have occurred.

Original NASA ASRS Text

Title: LGT INVOLUNTARY ROLLS WHEN THE SPOILERS ARE USED.

Narrative: DURING DSCNT INTO MCI IN ORDER TO COMPLY WITH AN ATC XING RESTR OVER PNE THE FO (FLYING) ACTIVATED THE FLT SPOILERS AND IMMEDIATELY ENCOUNTERED AN UNCOMMANDED ROLL TO THE R. THE ROLL WAS CTLABLE WITH CTL WHEEL FORCE TO THE L AND THE TENDENCY WAS ELIMINATED BY PLACING THE SPOILERS BACK TO THE DOWN POS. A NORMAL APCH AND LNDG WAS MADE TO MCI RWY 01L WITH A L XWIND UNTIL THE SPOILERS WERE RAISED DURING ROLLOUT. THE ACFT WAS GNDED AND MECHS RE-RIGGED THE AILERON INPUT INTO THE SPOILER MIXER. THE FOLLOWING MORNING THE ACFT WAS SCHEDULED FOR US TO FLY ON ANOTHER REVENUE FLT TO ATL. AFTER A THOROUGH FUNCTIONAL FLT CTLS CHK ON THE GND, THE SCHEDULED FLT WAS CONDUCTED. ALL WAS NORMAL UNTIL ON DOWNWIND LEG, I RAISED THE SPOILERS AND THIS TIME THE ACFT ROLLED TO THE R. THE CONDITION WAS AGAIN WRITTEN UP AND APPARENTLY CORRECTED BY A SIMILAR RERIGGING OF AILERON INPUT TO THE SPOILER MIXER. THE ACFT WAS BEING HAND FLOWN EACH TIME THE INCIDENTS OCCURRED. I AM CONCERNED THAT, HAD THE AUTOPLT BEEN ENGAGED, A MORE RAPID ROLL MIGHT HAVE OCCURRED.

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.