As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN SPEED BRAKES ARE EXTENDED, WITH TRIM AT ZERO, THE AIRCRAFT ROLLS TO THE RIGHT. *S/D* THE INBOARD LT FLIGHT SPOILER (A5) WAS NOT DEPLOYING FULLY BECAUSE OF A FAULTY ACTUATOR. ASYMMETRIC SPOILER DEPLOYMENT DURING SPEED BRAKE EXTENSION CAUSED THE ROLL. NR 5 FLIGHT SPOILER ACTUATOR REPLACED, SYSTEM OPERATES NORMALLY.