B737 ng captain reported experiencing several 15 degree rolls to the right due to a possible speedbr...

Attributes
ACN	1718455
Time
Date	202001
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737 Next Generation Undifferentiated
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR ZZZZZ 1
Flight Plan	IFR
Component
Aircraft Component	Speedbrake/Spoiler
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Experience	Flight Crew Last 90 Days 180 Flight Crew Total 20100 Flight Crew Type 9085
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

We were descending on the ZZZZ 1 arrival into ZZZ. As we were descending the first officer extended the speed brakes to help us get down. Upon retraction to about 50 percent stowed; the aircraft rolled right about 15 degrees. Then the autopilot rolled wings level. Once the speed brake was stowed to 25 percent it rolled again to the right 15 degrees and then it went wings level again. After the speed brakes were fully stowed; the aircraft rolled left 15 degrees and then back to wings level. After that we knew we had a spoiler problem and we decided we would not use the speed brakes for the remainder of the flight. After referencing the QRH and the manuals; we requested priority handling; we notified the flight attendants and we let the passengers know with a PA. We descended uneventfully with priority handling and landed with vehicles standing by. We taxied to the gate. We debriefed with maintenance and the flight operations.

Original NASA ASRS Text

Title: B737 NG Captain reported experiencing several 15 degree rolls to the right due to a possible speedbrake/spoiler malfunction during arrival flight phase. The crew landed uneventfully without the use of speedbrakes.

Narrative: We were descending on the ZZZZ 1 arrival into ZZZ. As we were descending the First Officer extended the speed brakes to help us get down. Upon retraction to about 50 percent stowed; the aircraft rolled right about 15 degrees. Then the autopilot rolled wings level. Once the speed brake was stowed to 25 percent it rolled again to the right 15 degrees and then it went wings level again. After the speed brakes were fully stowed; the aircraft rolled left 15 degrees and then back to wings level. After that we knew we had a spoiler problem and we decided we would not use the speed brakes for the remainder of the flight. After referencing the QRH and the manuals; we requested priority handling; we notified the flight attendants and we let the passengers know with a PA. We descended uneventfully with priority handling and landed with vehicles standing by. We taxied to the gate. We debriefed with maintenance and the flight operations.

Data retrieved from NASA's ASRS site 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.

B737 ng captain reported experiencing several 15 degree rolls to the right due to a possible speedbrake/spoiler malfunction during arrival flight phase. The crew landed uneventfully without the use of speedbrakes.