As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOT REPORTED THAT LT OTBD ROLL SPOILER WILL NOT EXTEND BUT THE INBD IS OK. MAINTENANCE DISCOVERED THAT THE LT OTBD ACTUATOR HSG WAS CRACKED. THE ACTUATOR WAS REPLACED IAW THE AMM AND THE ACFT RETURNED TO SERVICE, PN A44700-009, SN 0186.